| Noun | 1. | piece of ass - slang terms for sexual intercoursefuck, fucking, nookie, nooky, piece of tail, roll in the hay, screwing, shtup, ass, shag, screw carnal knowledge, coition, coitus, sex act, sexual congress, sexual intercourse, sexual relation, copulation, intercourse, relation, congress - the act of sexual procreation between a man and a woman; the man's penis is inserted into the woman's vagina and excited until orgasm and ejaculation occur | |