The Gumar means: One in which a group pretends to be a girl and trick another friend into thinking the girl is his. The “hot girl”, suggests that they meet for a fling. In order to stay longer in coitus, the move ends when cum the tricked friend has met. It is okay to then take a group picture and say to the victim, “You are the gumar.” The gumar refers to the one who was pranked with the gumar move. (in Community Dictionary, added by Macey Cannon)