fat guy in a weezer shirt Share definition Flag The guy who stares at you and your girlfriend through the McDonald's window with a milkshake. Jeff told me that him and his girl were creeped out by a fat guy in a Weezer shirt! fat guy in a weezer shirt by Brian Bell April 27, 2011 0 0 Get merch Get the fat guy in a weezer shirt mug. Buy Now — $32.95 See more merch