"heat bro" is a slang term used for great friends. Calling someone your heat bro basically means they're your best friend through thick and thin.
Greg: "What's up, heat bro?"
Alex: "Nothin' much. You?"
7👍 1👎
You angry bro?
You mad bro?
Matthew: Yo dis kid last night tried to jump me.
Andrew: Ya heated Bro?
5👍 7👎