1. Showing no courtesy; rude
   "a distant and at times discourteous young" 
2. Lacking social graces
   - ungracious

See also: abrupt, brusk [non-standard], brusque, caddish, courtesy, curt, discourteously, disrespectful, good manners, impolite, short, snippy, unceremonious, unchivalrous, ungallant

Antonym: courteous

• do in
• do it
• do justice
• do one's best
• do the dishes
• do the honors
• do the honours
• do up
• do well
• do well by
• do work
• do-gooder
• do-it-yourself
• do-it-yourselfer
• do-nothing
• do-or-die
• do-si-do
• doable
• dob
• dobber
• dobbin
• dobby
• Doberman
• Doberman pinscher
• Dobermann