A girl that enjoys anal sex, sometimes even over vaginal sex. This is usually a secret preference, and not advertised by the girl, to avoid jokes and to protect her "reputation" as a "nice" girl.
She'll never admit it, but I've heard that she's a Backdoor Betty!
by TheMaskedMarvel February 1, 2010
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A Southern girl who won't have vaginal sex, but will have anal sex, before marriage.
Self explanatory, isn't it?
by Mike January 17, 2005
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Often found to be carpenters, due to a fondness for wood, a backdoor burglar will glady insert his dowel rod in the one place nature never intended - your bucket of an arse. Like any good burglar, if he spots an opportunity he'll be quick to knock in your brown door and paint it white on the way out.

It is important to stress that unlike ass-bandits, marmite-miners, fudge-packers, butt-pirates and the like, generally speaking a backdoor burglar will plunder your ass without your consent/and or knowledge.

However, particularly fiesty homosexuals will mutually burgle each others arses, due to the fear/excitement of being caught - like the old fashioned game in which you must steal the keys without the other noticing. In this case, replace keys with butt-fudge.
Example 1:

Guy 1: "Dude my ass is sore today, what the hell happened at Mike's party last night."

Guy 2: "Dunno man but you were pretty drunk and I noticed some dodgy pervert hanging around, perhaps you got your backdoor burgled?"

Example 2:

Guy 1: Hey man, shall we go into Club X tonight? My uncle says its good fun.

Guy 2: Maaaaate. Are you a fucking ass bandit? That place is for backdoor burglars ONLY.
by Borkopenny May 13, 2009
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A method of sexual stimulation which requires one to sit on the hand until numb and then proceed to finger ones butt-hole.
"I heard Kenny attempted a backdoor-stranger yesterday, but it went awry."
by John Winston The 1st January 30, 2010
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A delicacy, Backdoor Fondue involves pouring warm melted cheese into your partners butthole. (Or waiting for a string cheese stick to melt after insertion.) After a full pour you proceed to eat said cheese out of your partners orfice. (Prefferably with lunch/exotic meats, sinks well with a slice of salami.)
Bro I was so excited last night my girlfriend asked me if we could have Backdoor Fondue for dinner.
by NaniwaSama December 17, 2022
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someone who has not been penetrated in the ass yet.
Be careful, Im a backdoor virgin!
by backdoor virgin January 6, 2010
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Cumming in a woman's ass and making another woman eat the cum out of her ass
I just had a threesome and i gave the ugly bitch a backdoor blumpkin
by akblumpkin May 8, 2010
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