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Somebody with a big, juicy butt.
Whoa, look at J-lo! She's got a fluffy-butt!
by RatchetBoo March 30, 2003
A cute butt that's fuckably nice.

Reference: My mind made it up.
Mia: I'm a pear shape & I think all the foods that I ate goes to my butt.
Kenji: Fluffy Butt!
Mia: *blushes*
by KenjiMia May 04, 2010