Someone who hasn't had anyone "knock on the backdoor" - Kane Show War of the Roses
"Megan is still a virgin but not a buttgin."
by Kane Show February 20, 2014
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"Man, I took her buttginity." ...Thereby indicating that the young man was the first to penetrate a young lady's anal cavity.
by The Spicy Daddy October 19, 2007
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The act of losing ones virginity by mean of anal penetration. Typically reserved for homosexual men and women of faith.
Nate lost his buttginity in the backseat of his mom's nissan sentra after watching harry potter 3
by Twatmonger November 5, 2019
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The deflowering of an anus, usually a mans anus.
Im wearing a chastity belt on my ass this week for the fantasy football playoffs because Booth is trying to take my buttginity.
by Butt crew king December 11, 2019
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Someone who hasn't had anyone "knock on the back door."
Guy: Do you know if that girl at the end of the bar is into anal?

Bartender: I'm not sure, I think she's a buttgin.
by TheSnowMan52896 February 20, 2014
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A person who has yet to have anal sex.
"Dude, has Jim stuck it in Nancy's cornhole yet?"
"Nah, they're both total buttgins"
by xoxobitty February 20, 2014
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