Toxic Smell Share definition Flag n. Slang variation of Taco Bell. A reference to the ass gas caused by eating Taco Bell food. Ben: Where do you want to eat? Andrew: Let's hit up Toxic Smell. Toxic Smell by Drewwic September 21, 2007 0 0 Get merch Get the Toxic Smell mug. Buy Now — $32.95 See more merch