Obscene, lewd, or vulgar: "[He] uses language so aggressively raunchy that he seems to be insisting his choice of vocabulary, at least, is no sin"(Wall Street Journal).
Sexually explicit.
Exhibiting lust.
Grimy; unkempt: a raunchy closet full of dirty socks.
[Origin unknown.] raun'chi·ly adv., raun'chi·ness n.