locker thief Share definition Flag A dude in prison who's usually broke or a dope fiend who steals from other people's lockers. Junebug is a damn locker thief, he took five of my soups I bought at canteen. locker thief by Da ChampSJA April 6, 2007 0 0 Get merch Get the locker thief mug. Buy Now — $32.95 See more merch