As the type of the smallest, weakest, or least significant part of the body; esp. in to have more —— in one's little finger than (and variants).

In negative contexts: a thing of little value. Obsolete.

Used as a type of what is of extremely small magnitude, value, or measure; a jot or tittle; an iota; the slightest thing; the least degree. See also…

As a type of anything small or contemptible.

a pin's head (also point): a type of something very small, insignificant, or worthless.

= fitchew, n.

Any of various parts of meat rich in muscle tissue. Cf. mouse buttock n. mouse-piece n. at compounds 2a. Now British regional.

A person or thing of relatively small size, power, or significance.

Chiefly figurative (humorous). the pestle of a lark: the leg of a lark; something very small, a trifle. pestle of a portigue: a small piece of gold…

As a type of something extremely small in extent, capacity, etc.

The head of a pin; frequently taken as the type of something very small, inexpensive, or insignificant. Also: an object resembling or suggestive…

The point of a pin; a tiny dot or point. Frequently used as the type of something small or sharp. Also figurative. Cf. pin, n.1 5c.

A small or trifling thing. Now rare.

(a) a type of something small or insignificant; (b) plural (slang, originally U.S.), the acme of excellence; ‘the cat's whiskers’.

colloquial (originally U.S.). A small, unintelligent, or unimportant person (see also quots. 1945, 1968).

figurative and in extended use. Something resembling a postage stamp, esp. in being very small.