Ghetto Onion Share definition Flag A large, well-rounded pair of buttocks. (Looks so good, it makes you wanna cry.) Damn, look at tha fine ghetto onion on J.Lo! I got tears in my eyes! Ghetto Onion by Gourmet Princess April 24, 2003 0 0 Get merch Get the Ghetto Onion mug. Buy Now — $32.95 See more merch