keister meaning and definition

KEISTER noun

Definition of keister (noun)

1. the fleshy part of the human body that you sit on
   • "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
   • synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, fundament, hind end, hindquarters, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush