When your giving it to her up the bootyhole and you
cum then pull out and what looks like a pink
sock comes out and drools light brown
liquid
Also can be used to reference a persons looks
1.Anne: Aww
Jim You gave me a Nusted Butt!!
Jim: *Gag* ANNE WHAT IN THE FUCK!!
2. Person 1:Yo you didnt go home with that chick last night did you?
Person 2: yeah why?
Person 1: ahhh dude!!!! she looked like a "Nusted Butt"!
Anne: Well you did it
Jim Jeez!