1. To automatically create an account with full priviledges that is hidden from the user(s) of the program, so any time they get locked out the creator can log in and solve the prblem for them (a maintenance account)
2. as above, but with ulterior motives. See spyware
3. As above, but because the software is not designed for used by it's creator.
Particularly common in movies about or involving computer hacking.
2. "The moron downloaded the program and now I'm watching his every move through the backdoor!"
3. "I was designing a new piece of control software for NASA, but I threw in an emergency backdoor as a precaution."
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.
Alex: "I'll put my three armies on Kamchatka...Sarah, let's roll for Alaska."
Stuart (pointing): "Ohhhhhhh....you just got backdoored!"