alfalfa munch Share definition Flag the act of giving oral sex to a woman who is not completely shaved "Look at those two manly chicks holding hands", said Biff. "Yeah, they must be serious alfalfa munchers." replied Joe alfalfa munch by Big Bad Billy March 14, 2007 0 0 Get merch Get the alfalfa munch mug. Buy Now — $32.95 See more merch