Promiscuous Girlfriend Syndrome

When a guy has a girlfriend that he thinks/knows cheats on him, so he's mistrustful of everything and everyone with a dick he comes in contact with. Charachterized by low ego, short temper and mistrustfulness.

Guy 1:"dude, what happened to dominic? We were, like, tight until he got mad cuz his girl looked at me for half a second. He like, wanted to fight me and i didnt say shit to her..."
Guy 2:"he's got Promiscuous girlfriend syndrome bro. She fucked, like, half the dorm."