Having an unusually shaped ass resulting directly from the only exercise that person receives is legs up in the air missionary sex. Usually sported by middle-aged house wives who sing kareoke at your local bar on Thursday nights.
I could tell before she even turned around that she was a fuck butt.
by fuck butt August 10, 2007
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Man, you have a nasty case of fuck butt. - time to take a shower.
by vavavavoom September 14, 2009
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to fuck a butt. also used for conflict enders.
"hey get the fuck out of my house bro"!

"hey why dont you jus fuck butt"!
by Ricardo II December 25, 2008
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the terms refers to the posture one has after receiving anal sex time and time again. those with butt fuck butt are seen with what appears to be an exaggerated slouch when walking or standing, but in actuality it is unreversable muscle damage of the lower back muscles. the term most often refers to homosexual men, but women are also known to sport butt fuck butt.
family member 1: hey is julian, aunt shandra son, gay?

family member 2: hell yeah, look how that nigga walk.....he got that butt-fuck-butt.
by Brent "Witty" March 5, 2010
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To slam your large member deep into the rectum of your girlfriend, vigorously gliding it in and out of her puckered anus over and over and over until you gush a huge glob of your thick ball batter DEEP into her gut. Probably the greatest joy known to man.
Man, I was so horny last night that once i butt fucked Rachel, she was still leaking my semen for 3 hours.
by boricuadepuracepa July 25, 2011
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sex where a penis penetraits someone's anus
Sheryl almost died when tom asked her if she wanted to butt fuck
by Anonymous June 17, 2002
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The art of using your rifle butt to literally fuck someone up in a war zone scenario....
American Troop: *gun goes click*
Wehrmacht Troop: *gun goes click*
American Troop: It's time to get butt fucked you Kraut Bastard!

*American Troop proceeds to smash Opponents skull in repetitivly with his rifle butt*
by SovietSpaghetti August 28, 2016
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