it's dat boi Share definition Flag Dat Boi means when there is a frog on a unicycle and greets you with"Oh dat Boi oh shit whatup" then leaves It's dat BoiDat whatDat Boi its Dat Boi Carl you mistake!!! it's dat boi by Roger da dodger June 10, 2016 0 0 Get merch Get the it's dat boi mug. Buy Now — $32.95 See more merch