Smiggity big'uns Share definition Flag A celebratory phrase reffering to the size of a female's booty or breasts. (Ray) Did you see that girls booty. Oh my god!!! (Bryan) Yessir. Smiggity big'uns!!!! Smiggity big'uns by BGoody February 28, 2007 0 0 Get merch Get the Smiggity big'uns mug. Buy Now — $32.95 See more merch