gallon booty
a booty so big it could be a gallon of sweat. like you just ran a marathon and your ass is the finish line.
My friend’s booty is a gallon booty. It’s like it’s been sitting there for years.
That girl’s ass is a gallon booty. I could live in it.
My teacher’s booty is a gallon booty. I bet it’s been there since the first day of school.