A girl with flat butt that has a little sag to it in an unappealing manor, usually in a pair of jeans. A butt that resembles a sagging baby diper.
Man, yo girl gots Diaper Booty. or When that girl turned around, I almost ran from her Diaper Booty.
by SellinUdreamS August 23, 2006
Get the Diaper Bootymug. by Granddaddypappi November 27, 2013
Get the Diaper Bootymug. by Karc30 June 3, 2009
Get the Diaper bootymug. 