mamp stamp Share definition Flag A lower back tattoo close to the top of the ass crack, like a tramp stamp, but on a guy. I don't know what looks worse, that chick's tramp stamp or her boyfriend's mamp stamp. mamp stamp by JimmyJazz111 January 26, 2014 0 0 Get merch Get the mamp stamp mug. Buy Now — $32.95 See more merch
