Skinny Fat Kids Share definition Flag in its simplest terms. A person who eats a lot but appears to be skinny on the outside. Populus, Stump, and Scizorface are all examples of Skinny Fat Kids. Skinny Fat Kids by SFKfan#1 November 3, 2006 0 0 Get merch Get the Skinny Fat Kids mug. Buy Now — $32.95 See more merch