kait bro Share definition Flag A girl who is funny,sexy,a great friend.She can get any guy she wants,and she has a big additude.When people first see her they would think she would be stuck up. "She is acting like kait bro" kait bro by Sophie.ie April 21, 2017 0 0 Get merch Get the kait bro mug. Buy Now — $32.95 See more merch