The act of forming a hook shape with either 1 or 2 fingers and proceeding to jam it into your buddy's ass to see his reaction and discomfort. It is not at all homosexual but extremely hilarious. One usually screams HOOK!! during the action of brown hooking someone.
Worker 1-(bending over to pick something up)
Worker 2- (Screams HOOK!!)and brown hooks the unsuspecting worker