When a male/female has sexual relations with a friend's boy/girlfriend.
"I think my friend is back dooring me, I saw his boxers in my girlfriend's covers the other day!"
by DellyWasHere February 29, 2012
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When someone gets setup for a robbery or murder by their own people
I don't think Eddie's murder was random, I think he got back doored.
by 051 melly February 20, 2020
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To cut someone out of a transaction (e.g. drug deal, embezzlement, etc.).
Minerva: I was involved with embezzlement and he was too. But I wasn't gonna back door him and cut him out!
by ZXY&ABC July 22, 2019
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Back door

1) A secondary entry/exit door, normally located at the rear of a propety.

2) A slang term for the anus
1) Glenda's back door was jammed shut, so she had to call the locksmith in.

2) Tom fucked Glenda, up the back door
by Coffee_addict July 18, 2004
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Refers to a person's anus in the context of anal intercourse.
Sally likes it in the back door.
by Goad January 20, 2003
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1. dishonest

2. the anus

3. a malicious computer program installed to allow access by hackers and other malware
I think I just found a back door convenience store.
by Light Joker April 6, 2006
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a word to describe cheap but dangerous medical procedures usually done in secret and often by an unlicensed surgeon
"We have a recent rectangular transection on the left occipital, some kind of back-door brain surgery"
-Dr. Heffner at Jigsaw's autopsy, Saw 4

Did you hear of the guy who died during a cheap, back-door liposuction? that surgeon didn't even have a license!
by butterfly on the wall August 7, 2009
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