Swass Share definition Flag Swass is when the crack of your ass is soaked with sweat and you literally feel a breeze when the wind blows. Susie must be hot because she left a swass mark on her chair! Swass by Megaphone ¯\_(ツ)_/¯ February 13, 2017 0 0 Get merch Get the Swass mug. Buy Now — $32.95 See more merch