Xianghai Share definition Flag (v.) to fall into a state of outward emotionlessness, to become unresponsive to surrounding stimuli; syn: to zone out, to get stoned, to die. "where the hell is Wayne?" "dude, he's totally xianghaied in the middle of the road." Xianghai by Lucas F September 16, 2008 0 0 Get merch Get the Xianghai mug. Buy Now — $32.95 See more merch