Brat Child Share definition Flag A. An annoying/obnoxious child.B. Kevin Smith. C. Not Kevin Smiths girlfriend, Kira. You are such a brat child. So I had to prove you wrong. Brat Child by shestheenemy May 11, 2014 0 0 Get merch Get the Brat Child mug. Buy Now — $32.95 See more merch