A slut with a nicebutt. Usually likes to show off her butt.
Two guys see a hot girl at the beach wearing a two-piece bikini. As she walks past them, they notice that her bikini bottoms are a g-string with her ass on full display.
Guy 1: "God damn... Check out the ass on that girl!"
Guy 2: "Now THAT is onefine buttslut!"
Guy 1: "God bless whoever invented butt floss bikinis!"
Guy 2: "Amen brother!"