I wouldn't lick a grapefruit Share definition Flag An expression used when pointing out something interesting noticed. Well, I wouldn't lick a grapefruit, but his forehead is pretty massive. I wouldn't lick a grapefruit by Ajurfhas November 27, 2005 0 0 Get merch Get the I wouldn't lick a grapefruit mug. Buy Now — $32.95 See more merch