Fatty Sled Share definition Flag A fatty sled is the cart fatties ride in stores like Walmart because they are 600lbs and too lazy to walk. Look at that heffer riding the fatty sled! It's barely movin'! Fatty Sled by Jackieboy17 September 2, 2016 0 0 Get merch Get the Fatty Sled mug. Buy Now — $32.95 See more merch