wacky tabacki Share definition Flag Slang for marijuana. Derived from "wacky tobacco" If you put the ice cream away in the dishwasher, better stop smokin' the wacky tabacki! wacky tabacki by billphoto May 30, 2009 0 0 Get merch Get the wacky tabacki mug. Buy Now — $32.95 See more merch