look up any word, like swoll:
 
1.
a booty that is not neat and petite OR big and beautiful - its a sloppy booty.
You know those girls you see when their pants are a little too tight for the size and proportion of their badonkadonk. Their booties just don't fit!!!!

"That's trife! Look at that girls sloppy booty!"
by M-star and Ninja Pants February 02, 2008