Stomach Mop Share definition Flag Any article of clothing, old sheet, pillow case, towel, etc that is used to mop up ejaculate. Aw shit. Lori must've used my favorite T-shirt as a stomach mop again. Goddammit, Era Plus won't even get that stain out. Stomach Mop by Anonymous June 9, 2003 0 0 Get merch Get the Stomach Mop mug. Buy Now — $32.95 See more merch