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A butt so big and messy it looks like someone threw a bowl of oatmeal at it and didn't clean it up. Usually found on a woman who could probably eat a whole pie for breakfast.
My aunt's oatmeal booty looks like it came out of a cereal box and got hit by a truck.
I saw my mom’s oatmeal booty and I almost cried.
That woman’s oatmeal booty is so big, it’s got its own zip code.