Bong-rat Share definition Flag a person who smoke marijuana at least once a day cain - "let's go for a smoke" matt - "yeah, i got heaps of choof" alvin - "fuck, you guys are bong-rats" Bong-rat by hobskiz November 2, 2008 0 0 Get merch Get the Bong-rat mug. Buy Now — $32.95 See more merch