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A knit suit or skirt out of shape in the rear.
My late wife's ass had gotten so big that she butt sprung all those expensive skirts I bought her.
big ass women worn out clothes huge butts
by Stendig October 10, 2010
the wear area of the recliner after extensive use
no more sex on the lazyboy, its totally buttsprung
by lightseeka August 01, 2011