Bum Share definition Flag An insult fake rich idiots like to call others they think are homeless. As if the fake rich idiots aren’t the real bums...idiots.... Dumb idiot calling another random person ‘Bum’.... Bum by mcr fan dude. January 25, 2021 0 0 Get merch Get the Bum mug. Buy Now — $32.95 See more merch