slang Marijuana. ("Tobacky" is a play on "tobacco," referring to the way marijuana is usually rolled up and smoked like a cigarette.) I could tell from his red eyes and goofy behavior that he had been smoking the wacky-tobacky again. I got some wacky-tobacky from my brother's friend. Wanna come smoke up with me later?
n. marijuana. (Collegiate.) He gets that silly look in his eye from smoking “wacky-tabbacky.”