bottomstank Share definition Flag Bottom stank is the smell that lingers around the underside of a man's nut sack and in the crack of is ass. Damnn, you need to wash your ass because you have a badd case ofbottomstank. bottomstank by Beagleman22 August 4, 2017 0 0 Get merch Get the bottomstank mug. Buy Now — $32.95 See more merch