Ba-unka-unk Share definition Flag A ba-unka-unk is a girl that has a booty but no D's. Derived from Badunkadunk. Big booty no boobies. Damn that chick is hot. Naw man shes a ba-unka-unk. I could rest a cup on that ba-unka-unk Ba-unka-unk by Kevin V. & Nate J. January 4, 2009 0 0 Get merch Get the Ba-unka-unk mug. Buy Now — $32.95 See more merch