preptobismol Share definition Flag a annoying prep who wears pink on over half her body way to much (usually 80-90% of the time) "look its preptobismol, god her clothes are blinding why dosent she pick another color?" preptobismol by hot fro man June 22, 2005 0 0 Get merch Get the preptobismol mug. Buy Now — $32.95 See more merch