What is Fuck Butt?
1.
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.
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2.
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"!
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