Not quick in learning, thinking, or understanding; lacking mental acuity; dull, dim. Of a person or (occasionally) an animal. Also with in, of.

Foolish, stupid. Obsolete.

Not quick in intelligence or mental perception; slow of understanding; not sharp of wit; obtuse, stupid, inapprehensive. In early use, sometimes…

Slow-witted, unperceptive; dull, obtuse, stupid. Frequently in hard wit. Cf. hardhead, n.2 2a, hard-witted adj. (a) at compounds 4. Now rare.

Stupid, foolish.

Foolish, stupid. Obsolete.

Sluggish, slow, stupid, dull.

Blunt; figurative dull, stupid.

Characterized by a lack of knowledge or education; not having or showing a high level of mental acuity; intellectually unsophisticated.

Of persons, their qualities, etc.: ponderous and slow in intellectual processes; wanting in facility, vivacity, or lightness; †slow of…

Stupid.

Simple, silly. Obsolete.

Having a dull wit; stupid.

Sluggish, dull, sottish, stupid.

Having the qualities of a steer; brutish.

resembling or characteristic of an ass; asinine.

Foolish, irrational; having or showing a lack of intelligence, thought, or self-control.

Dull, stupid; absurd. Obsolete.

Of the mind, disposition, etc.: Characterized by or exhibiting lack of vigour, alertness, or energy; slow in apprehension or decision; dull.

lacking intelligence.

figurative. Annoyingly unperceptive or slow to understand; stupid; insensitive. Also, of a remark, action, etc.: exhibiting dullness, stupidity or…

Slothful, spiritless; stupid, ignorant; (sometimes more generally) contemptible.

Dull-witted, stupid.

Used as the type of heavy dullness or stupidity. The phrase deaf,or dumb as a beetle, probably belongs here; but cf. beetle, n.2 3.

Stupid; foolish, crazed; affected in mind.

Lacking in delicacy of perception; dull, stupid. Obsolete of persons, their opinions and utterances; archaic of faculties, after Matthew xiii. 15.

Brainless, foolish; senseless, stupid. In later use chiefly in collocation with heartless, and somewhat rare. Of a person or group of people.

Foolish, stupid.

Stupid, foolish, idiotic.

Stupid; thickheaded.

Of a person: slow to learn or understand; lacking intelligence or perceptiveness; acting without common sense or good judgement. In later use also…

A fool, simpleton. †Also as adj., stupid.

Of the nature of or like a dolt; foolish, stupid, thick-headed, senseless.

Dull, stupid, slow-witted; inactive, inert, spiritless; destitute of sensation; abstracted, insensible to outward things; dull, uninteresting. Obs…

Asinine, foolish, stupid.

Like a senseless block in the want of apprehension; excessively dull, stupid, obtuse. of persons.

Slow to learn or understand; dull, stupid.

Having a ‘block-head’; obtuse of intellect, dull, stupid. Of persons (rarely their productions).

Mathematics. Of a number or quantity (esp. a root): That cannot be expressed in finite terms of ordinary numbers or quantities: = irrational, adj. 3…

Having the head dull or stupid; slow-witted; obtuse in intellect.

figurative. Dull in intellect; stupid; beetle-headed.

attributive and in other combinations, as skit-brains, skit-brained, in opprobrious use.

Like a buzzard; stupid(ly), senseless(ly).

Deficient in understanding; having undeveloped or imperfect intellectual power; unintelligent, undiscerning; stupid, dull-witted.

having a head like a log.

Of, relating to, or characteristic of an ass, asinine; spec. foolish, stupid. In later use also: unpleasant, disagreeable.

Foolish, doltish, stupid. Of persons, or their faculties. Obsolete.

Inert of mind or action; stupid, dull. Obsolete.

= stupid, adj. (in various senses). Now chiefly: unintelligent, foolish. Cf. stupidous, adj.

Resembling a calf, calf-like; doltish, stupid.

Rather blunt, somewhat blunt.

Foolish, stupid, silly. Cf. cod's head, n. 2.

Thick-headed, stupid.

foolish, stupid.

dull-headed.

Not ‘sharp’ in discernment, stupid.

With allusion to the ears of the donkey: foolish, stupid; obstinate, stubborn. Cf. asinine, adj. 2. Now archaic.

Stupid, inert, dull.

figurative. Having some quality likened to the hard dry consistence of wood, or to its inferior… Of persons or their attributes: Mentally dull…

Slow to learn or understand; stupid, unintelligent, dim-witted. Cf. dunce, n. 3.

Senseless, stupid, ‘blind’.

Slow to learn or understand, stupid, dull. Cf. duncical, adj. 2.

Dull, stupid.

Having shallow brains; having no depth of intellect.

humorous. Stupid, dull. Obsolete.

Dull, stupid.

dull clod-pated.

Displaying the characteristics of a fat animal; slow-witted, indolent, self-complacent.

Of slow wit, dull, ‘thick-headed’.

Combinations, as knotty-pated adj., blockheaded.

= stupid, adj. (in various senses). Now chiefly: unintelligent, foolish. Cf. stupidious, adj.

having lost wit, senseless, foolish.

Of persons: Mentally unproductive; unresponsive, dull, yielding no mental fruit.

Slow to learn or understand, stupid, uncomprehending.

= lourd, adj.

Resembling a stock or block of wood; esp. of a person, excessively dull, stupid or ‘wooden’.

Of mental faculties or actions, or of persons: Slow (or characterized by slowness) of apprehension; dense, crass, thick-headed; stupid, obtuse…

General attributive and appositive (in sense 1), as booby class, booby fool, etc.

Having no talents or parts (part, n.1 15). Obsolete. rare.

having a thin or narrow head; figurative shallow-pated, silly.

Blockheaded, stupid. Obsolete.

foolish, stupid.

(a) Having the (representation of the) head of a ram. †(b) figurative. That is a cuckold, cuckolded; slow-witted, stupid; in early use also as a…

(= beef-brained adj.).

Lacking wit or sense; dull, insipid, stupid; senseless, absurd.

Having the qualities by which the ass is characterized; obstinate, stupid, doltish.

Benumbed with cold; hence, stupid, dull, stolid of mind; inept of hands, unhandy, unready, idle, lazy; in modern dialect, also, gruff, surly (cf. an…

Of or pertaining to, or like a blockhead; stupid.

Deficient in sense or mental vigour; stupid, dull, slow-witted.

Thick-headed, stupid.

having the head of a puppy.

(In sense A. 9b.)

Half-intelligent; deficient in intellect, stupid.

thick-headed, stupid.

toom-handed, toom-headed, toom-skinned adjs.

Having ‘thick’ wits; dull of intellect, stupid.

= woolly-headed, adj. c.

= squirrel-minded adj.

Thickheaded, stupid, dense.

as sad as any mallet. Cf. beetle, n.1 2. Obsolete.

of inferior intellect or parts.

Stupid; lacking in intelligence or common sense.

Lacking or deficient in (common) sense or reason; simple; senseless. Obs.

Devoid of taste, intelligence, or judgement; stupid, foolish, dull. Obsolete.

= insulse, adj. 1.

Lacking intelligence or common sense; foolish, silly, stupid.

Having a thick skull; hence figurative slow or dull of apprehension; dense, dull-witted; = thick-headed, adj.

Somewhat muddy. Also figurative.

Not intelligent, unintelligent; (formerly also) †not comprehensible (obsolete).

weak-brained.

foolish, stupid.

wooden-headed, dense or obtuse in intellect.

stupid, slow-witted.

at the top of the tree, in the highest position: see top, n.1 28. up a tree (colloquial, originally U.S.), debarred from escape, like a hunted…

Resembling or characteristic of a booby (booby, n.1 1); booby-like; inept, awkward, blundering. Cf. boobyish, adj.

Deficient in or lacking thought; not given to thinking; stupid, senseless; destitute of ideas.

= lourd, adj.

Thick, heavy, stupid.

Deficient in intelligence or intellect; dull, stupid. Also absol.

= Bœotian, adj.

Lacking in judgement or common sense; foolish, thoughtless. Cf. feather-brained, adj.

Of inferior or deficient understanding; half-witted.

attributive or adj.= logger-headed, adj.

Of a person: stupid, foolish, slow-witted.

Unintelligent. Obsolete. rare.

Having a head like a buffalo's. Obsolete.

= crass, adj.

Esp. of a person: stupid, foolish.

= crass, adj.

Of a person: stupid; foolish.

An idiot, a fool; a grotesque image. Also as adj.: stupid. English regional in later use.

Of persons, their actions, manner, etc.: dulled, drowsy, spiritless; confused, mentally hazy; dazed and unfocused. Cf. sense 2.

foolish, stupid.

Of a person: slow-witted, stupid; foolish. Also: surly, sullen. Cf. sumphy adj. at sumph, n.1 derivatives.

stupid, stolid.

Stupid, unintelligent; lacking in or incapable of learning.

Dull, stupid, obtuse.

Unintelligent, dim-witted, stupid.

Foolish, stupid, ignorant (chiefly of persons); spec. dumb blonde, a conspicuously attractive but stupid blonde woman; dumb bunny, a stupid person…

Slow to learn or understand; stupid, unintelligent, dim-witted.

Of a person: mentally weak or deficient; lacking in intelligence or intellectual ability; stupid, foolish, idiotic. Sometimes spec.: suffering from…

Dull, stupid, slow-witted; silly, foolish.

Having a chuckle-head; block-headed.

Of or belonging to a jobbernowl; foolish, stupid. Obsolete.

Dull, dim (literal and figurative); stupid, foolish; lacking in spirit or courage; ineffectual.

Resembling or characteristic of a booby (booby, n.1 1); booby-like; inept, awkward, blundering.

attributive. That is a wittol, pertaining to or characteristic of a wittol; transferred half-witted, senseless.

Stupid, half-witted.

Impervious to reason; stupid, obtuse. Obsolete.

= stupid, adj. (in various senses); esp. unintelligent, foolish.

Stupid. Cf. muddle-headed, adj., muddy-headed adj. at muddy, adj. n.2compounds 1.

Of a person or a person's mind: limited in scope or outlook; narrow-minded.

Confused, befuddled.

thick-headed, stupid.

Having a thick head. figurative. Dull of intellect; slow-witted, obtuse.

Silly, foolish, idiotic.

Slow to learn or understand; stupid, unintelligent. Cf. dunce, n. 3.

Insignificant, inconsequential, trivial; slight; lacking intelligence or profundity. Also in a more neutral sense: not serious, light-hearted, breezy.

Of or belonging to a numbskull; foolish, stupid.

block-head (also attributive).

Not intellectually developed; dull.

figurative. transferred. Of persons: Stupid, ‘thick-headed’.

characteristic of or resembling a ninny; foolish.

colloquial. Slow to learn or understand; lacking in intelligence; stupid, dull. Obsolete.

Spongy, loose-textured; also of flesh = foggy, adj. 6a. Also figurative, ‘fat-witted’.

having a head resembling a potato; (also) thickheaded, dull, stupid.

= beef-brained adj.

like a donkey, asinine; stupid, foolish.

Of the nature of a blockhead; stupid, obtuse.

figurative (derogatory). Having a small brain; lacking intelligence; foolish.

shallow-brained.

having a pumpkin-head.

Typical of or appropriate to a tomfool; very foolish; absurd, ridiculous.

Stupid, foolish; dunderheaded; blundering.

Foolish, stupid.

like a bump on a log: in a state of silence, immobility, passivity, or insignificance.

Designating or characteristic of a numbskull; blockheaded.

Characteristic of or resembling a nincompoop; foolish, simple-minded. Also as n. (with the): nincompoops as a class.

stupid, slow-witted; cf. suet-headed adj.

Like a doll; dollish, babyish; also, stupid, foolish.

Stupid, silly.

Characterized by heaviness, dullness, or want of vivacity.

Empty-headed.

colloquial. Clumsy; stupid; mindless, unthinking. Cf. numbskull, n.

figurative. Inert, sluggish; dull, stupid; cf. bucolic, adj. 2.

Dull and heavy in motion or thought. Also in combinations as logy-looking.

Of persons: Grossly stupid, ‘dense’; grossly insensitive or unrefined (rare).

(un-, prefix1 affix 1.)

Jocosely applied to the head. off his chump (vulgar): ‘off his head’, out of his senses.

having a ‘wooden head’, stupid.

Stupid, foolish, idiotic.

Of, relating to, or characteristic of a duffer (duffer, n.2 1); incompetent, inept, stupid.

Extremely stupid or foolish; idiotic, moronic. Cf. cretin, n. 2.

that dodders; now frequently mentally feeble or inept; futile, footling.

attributive or adj.= thick-headed, adj. b.

Originally and chiefly in Italian-speaking contexts: stupid.

slang (originally U.S.). That behaves like a bonehead (bonehead, n. 1a); characterized by such behaviour; blockheaded, stupid, thoughtless.

Having a woolly head. figurative. Dull-witted.

stupid, slow-witted; cf. suet-brained adj.

half cooked, half done; also figurative ‘half baked’, stupid.

Stupid, ‘dumb’.

slang (originally U.S.). Blockheaded, stupid, thoughtless; esp. (of a person) that behaves in a way typical of a bonehead; (of an action, etc.)…

woolly-minded.

Of a person: having a particularly small head. Hence generally: stupid, foolish; cf. peanut-brained adj. at peanut, n. adj.compounds 1b, pinheaded…

Delightful; delicious.

Of or designating a retardate. Also (derogatory slang): stupid, idiotic. Cf. retarded, adj. 2.

= nitwit, adj.

Stupid; uncouth; resembling or characteristic of a meathead.

Foolish, stupid, incompetent; easily duped or defeated. Frequently in mug punter (see punter, n.1 1b).

thick-headed.

slang. Crazy, ‘cracked’.

Stupid, foolish, idiotic.

Colloquial phrase dead from the neck up: brainless, stupid.

Foolish, simple-minded. Sometimes also: weak, ineffectual; soft, ‘wimpy’.

slang. Stupid; stubborn. rare.

Having the head or top fashioned or cut in a square form. Stolid, dull.

Crazy, absurd, eccentric; stupid, foolish. Cf. dingbat, n. 3, dingbat, adj.

colloquial. derogatory. Stupid, foolish; = pinheaded, adj. 1.

stupid, dull.

stupid, dull-witted, foolish; having a supposedly tiny brain.

Ignorant; uninformed; stupid. Cf. clue, n. 2e.

sluggish, stupefied.

North American slang. Stupid, silly; foolish; pathetic (sometimes considered offensive).

Having low intelligence; idiotic, stupid. Now rare.

Resembling or characteristic of a ‘clot’ (see clot, n. 4); stupid.

like a stunned mullet: dull, stupefied. Australian slang.

silly (or crazy) as a two-bob watch: extremely stupid, mad. Australian slang.

out to lunch: insane; stupid, unaware; socially unacceptable. North American slang.

having a very small brain, foolish, stupid.

Drowsy, sleepy. Also (colloquial), (mentally) sluggish; stupid; lazy.

idiotic.

tiny mind: except when used self-deprecatingly, a term of abuse suggesting an absence of common sense. Chiefly in colloquial phrase out of one's tiny…

Characteristic of a stupid or foolish person; dumb, dopey. Cf. goofus, adj.

Characteristic of or resembling a twit (twit, n.1 2b); stupid, silly, foolish. Cf. twittish, adj.

Characteristic of or resembling a twit (twit, n.1 2b); stupid, silly, foolish.

Characteristic of or like a twat (twat, n. 2); stupid, obnoxious, contemptible.

Characteristic of or like a twat (twat, n. 2); stupid, obnoxious, contemptible.

Singapore English. Slow in understanding; unaware, ignorant, confused. Sometimes reduplicated for emphasis.

Stupid, dim-witted; uninformed, clueless.

Stupid, foolish. Cf. doofus, adj.

Stupid, annoying, objectionable; knowingly obnoxious, provocative, or disruptive. Cf. dickhead, n. 1.

Characteristic of or like a dick (dick, n.1 6). Typically of a boy or man: annoying, unpleasant, or ignorant; esp. knowingly obnoxious…

Esp. of a person: stupid, foolish, idiotic.

slang. Characteristic of or like a cock (cock, n.1 11); obnoxious, provocative, or otherwise annoying or contemptible. Cf. dickish, adj.