look up any word, like muddin:
 
1.
A person with a fat ass
That girl has a fluff butt
by desantism July 25, 2004
 
2.
an extremely fat butt that is bigger than your body and cannot be fit through a door and will never be able to lose all the fat off your butt
friend: hey guess what?
person: what?
friend: Sabrina couldnt sit down because she had a big fluffbutt!
Person: OMG!! NO WAY!!!
by fluffykittycat1234 January 21, 2012