Mattress Biter Share definition Flag Worse than a pillow biter. Probably takes a 2x4 in the ass or something. Usually a fetish within the Caucasion race. Poor mattress biter, he can't even walk straight. Mattress Biter by The Marksman August 23, 2005 0 0 Get merch Get the Mattress Biter mug. Buy Now — $32.95 See more merch