Top Definition
The anus, vis-a-vis anal sex.
Make sure you lube it up before going in the backdoor.
by Brown Sugar March 18, 2003
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
Refers to a person's anus in the context of anal intercourse.
Sally likes it in the back door.
by Goad January 20, 2003
1. To gain unauthorized access in a surprise move to an undefended entry point.
2. In the context of the game Risk, to prevent a player from earining the North America bonus on his/her turn, by taking the country of Alaska by Kamchatka.
3. To access a program or computer through opened ports or scripts originally intened to allow the creator(s) special access to software or files.
4. The act of performing non-consensual anal sex.
Sarah: "So next turn I'll be able to get the North America bonus. There's my tactical move to fortify Greenland. I'm done."

Alex: "I'll put my three armies on Kamchatka...Sarah, let's roll for Alaska."

Stuart (pointing): " just got backdoored!"
by akwolf January 30, 2006
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 05, 2006
A tactic that has been used many times in the American version of "Big Brother" where the Head of Household (because we Americans apparently cannot vote properly, so the housemates have to do it for us...HoH just nominates) nominates two pawns and then has one of his or her allies win the Power of Veto (a twist in the American Big Brother game that allows one of the nominations to be cancelled, or vetoed) so that the real threat in the game can be nominated and then subsequently other words, evict them in such a way that they are sent "out the back door". Also referred to as "The Six-Finger Plan".
Nakomis pulled off one of the most innovative moves in "Big Brother" history when she nominated Marvin and Diane for eviction via "The Six-Finger Plan" to backdoor Jase and get him evicted from the house.
by Alternageek #1 August 12, 2005
Catching two cards in a row to make a particular hand.
Bruce Lee: Mr. T made the backdoor flush and won 3 million dollars.
Jose Contreras: He was probably pitying his opponents harder than he's ever pitied anyone before.
by benny b from the bronx February 21, 2005
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