Onion bum shit Share definition Flag If someone says onion bum shit to u it means ur mom gay lol. Ur career just got finished and you’ve been flamed Person1: onion bum shit Person2: drinks bleach and dies Onion bum shit by Onion bum shit May 8, 2019 0 0 Get merch Get the Onion bum shit mug. Buy Now — $32.95 See more merch