Top Definition
A motorized scooter used to propel fat people along smooth surfaces. They typically feature electric motors, and a storage basket so the fat people can use their flab-paddle arms to shove food items into it. They have rechargeable car batteries because they need a lot of power to move such heavy, fat asses.
"Hey Doc, get a load of that fat fuck riding their fucking Fatillac in the grocery isle."
by WillyWart March 29, 2013
The cart on which an obese, or fat person rides in a store such as Walmart, therefore adding to their obesity and removing the availability of the cart for someone who really needs it. A play on "Cadillac".
Bro, did you see that fat ass riding a fatillac? Now that poor old lady has to walk through the store with a walker.
by Maximillian Aloysius Reider II April 24, 2016

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