When a girl's thong underwear shows over the top of her pants. Similar to plumbers butt, but on a girl. plumbers butt Many guys/pigs like this look, but classy girls avoid having slut butt.
a girl that fucks a lot of guys and knows that but acts innocent. When you see her the slut just comes to your head and you just know she likes to get fucked hard.
A "slut butt" is a girl or boy that participates in slutty, yet childish and immature acts like: licking some guy's face that you just met, and/or grabbing a chick's boob making a cartoon honking noise while you have a girlfriend.
Dude, Maria was dancing with a random guy last night, and was all over him, with her boyfriend standing RIGHT there. . . She is such a slut butt.
one who sells their buttox on a regular basis for the pleasure of men. usually these butts become cum harden and the slut butt has problems in taking shits