nasty toothpaste Share definition Flag when a guy cums onto a toothbrush and makes a girl brush her teeth using the cum as toothpaste guy 1: I gave my girl a nasty toothpaste last night guy 2: DAAAAMN! you a playa homes nasty toothpaste by J-slicket May 21, 2006 0 0 Get merch Get the nasty toothpaste mug. Buy Now — $32.95 See more merch