A cross between the phrase "butt-ugly" and the word "nasty." In other words, it is the highest degree of nasty.
by Darian Johnson May 16, 2006
Ex.#1:person #1: "Amy Whinehouse's teeth and hair are butt nasty."
person #2: "I know!"
Ex.#2:girl #1: OMG, last night during the slumber party, my BFFs,like, dared me to,like,wear mascara on my lips and wear leg warmers in public!
sister: OMG, ewwww, that is soooooo butt nasty!
Ex.#3: tween boy #1: did you see the picture on page 52 in our health book? you know, the detailed pic about...
tween boy #2: yeah, that was butt nasty...
ex. #4: ghetto guy #1: man, i was at this one pool party yesterday, and when i went into the pool i saw my girlfriend with a booger danglin' from her nostril!
ghetto guy #2: Man, dat is butt nasty!
person #2: "I know!"
Ex.#2:girl #1: OMG, last night during the slumber party, my BFFs,like, dared me to,like,wear mascara on my lips and wear leg warmers in public!
sister: OMG, ewwww, that is soooooo butt nasty!
Ex.#3: tween boy #1: did you see the picture on page 52 in our health book? you know, the detailed pic about...
tween boy #2: yeah, that was butt nasty...
ex. #4: ghetto guy #1: man, i was at this one pool party yesterday, and when i went into the pool i saw my girlfriend with a booger danglin' from her nostril!
ghetto guy #2: Man, dat is butt nasty!
by codenamejester May 17, 2009
adj. any pipe containing marijuana that has been compleatly smoked to the point that there is absolutly no chance of there possibly being another hit.
by Hugonaut September 19, 2005
A woman who has a nasty butt. Usually from being anally fucked to many times. Wide butt crack, jiggling all over the damn place, so lumpy, it looks like cottage cheese.
Yo, has anyone seen Paris Hilton's ass? She is such a nasty butt girl.
My mama call women who have jiggly butts nasty butt girls.
My mama call women who have jiggly butts nasty butt girls.
by Taswaysha February 7, 2007
A weather condition where it is so hot and humid that a layer of moisture forms in between your butt cheeks.
It is butt nasty hot outside.
by dtomasek March 8, 2011