Carpet-Munching is a slang term for cunnilingus, the term for oral sex performed on a female, particularly the stimulation of the clitoris and the vulva by the tongue until orgasm.

A Carpet-Muncher is therefore someone who engages in a spot of rug-munching.

There are various other slang terms for carpet-munching including muff-diving, rug-munching and “eating hairy-pie.”