Top definition: a brothel (whore house)
Hey man, Iâm headed to the ass shack later. Can I borrow $200?
When a couple is naked and the man lays face down in bed while the woman sits on the upper half of his butt and gives him a backrub while simultaneously using his Coccyx bone to masturbate with.
Last night I fell asleep to my lady giving me the backdoor grind.