head up
n.— «“Ain’t going to be no head up!” Rodrick Kelly, 18, said a Blood yelled. “Head up” is street lingo for a fist fight or brawl. “Then shots fired—boom, boom—twice.”» —“Attorney says man fired shots in self-defense” by Colleen Jenkins St. Petersburg Times (Fla.) Aug. 15, 2006. (source: Double-Tongued Dictionary)