Fixer-Upper Share definition Flag A fat chick that a guy brings to the gym to workout with, hoping that she gets into shape so he can feel better about dating her. Dude, did you see that new chick at the gym today? Cute face but definitely a fixer-upper... Fixer-Upper by Nikstur February 14, 2013 0 0 Get merch Get the Fixer-Upper mug. Buy Now — $32.95 See more merch