One who's ass is full of Cellulite. There for making the ass look like a giant bowl of lumpy batter.
Dude, look at that chicks ass.

Oh my god, its a batter butt!
by Bween February 18, 2007
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Simply put, explosive, liquid shits. Often induced from too much alcohol and poor dietary choices.
Never again will I consume that much tequila. I've got some firey butt batter today. It's so explosive I'll need to perform a peripheral wipe when I'm done.
by Eaton Holgoode November 23, 2016
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When your poop isn't solid and resembles a pancake batter consistency.
Oh Nanci, I can't make it into work today. I have a severe case of butt batter.
by Jawsh00 May 10, 2017
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