A somewhat uncommon medical condition in which the afflicted party is hopelessly addicted to any of the butthole pleasures.
John was diagnosed with a severe case of buttsexitis, but he kept claiming that it was not about the butthole pleasures.
by ThreeTwelve November 3, 2007
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It means you put the penis in the ass. Duh?
"Our Buttsex was good last night! Wasn't it Kaitoo?" Riely asked
by Dick Heads January 31, 2015
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1) taking it like a man, in the behind.

2) doing wrong to someone, like backing into their new convertible and not leaving a note.
I totally buttsexed the shit outta that guy!

this fits both definitions.
by anniekin. August 10, 2007
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A "savory" treat selfish women like to reserve for special occasions
by Chico Rusty February 15, 2011
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John put his penis in and out of Edd's butt, real hard an fast. They had buttsex.
by Clash.360 September 21, 2009
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serge loved buttsex a whole lot, especially with his guy friends
by shitwrecker May 29, 2006
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