Wacky Doo Share definition Flag An extremely hot girl who makes you go Ga-Ga. 1950's slang. see also: "Uber Hot Babe" and/or "Hot Girl". Check out the one on the left, what a Wacky Doo. *wolf whistle* Wacky Doo by Add Bacon September 8, 2012 0 0 Get merch Get the Wacky Doo mug. Buy Now — $32.95 See more merch