You Mad Bro Share definition Flag A short form in saying a swear or making someone mad by speaking this comeback. Bob: Damn I can't shoot a basketballl today.Liam: You Mad Bro?Bob: F%@$* YOU! You Mad Bro by lemonlogan August 6, 2011 0 0 Get merch Get the You Mad Bro mug. Buy Now — $32.95 See more merch