Urban Dictionary: go off
www.urbandictionary.com › defineNov 13, 2017 · go off expression A (usually) humorous statement that is called out when somebody has finished ranting, somebody is yelling, makes some sort of grand or ridiculous gesture, or even when you hear a loud noise, like a car horn. Almost always meant to draw laughter from those surrounding you. In traffic : honk "Damn, I mean go off"