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back door

noun, adj, verb — 14 senses

back door

noun
7 senses
  1. 1A subsidiary entrance to a building or house at its…
  2. 2A means of access, often secret and unprotected, to something.
  3. 3A secret means of access to a program or system.
  4. 4A rear side door of a car, or at the back of a van.
  5. 5The anus (usually in sexual practices).
  6. 6Anal sex.
  7. 7The rear side of the hole, furthest from the golfer.
1

A subsidiary entrance to a building or house at its rear, normally away from the street.

  • "Charles II, who was crowned here a little while before, occupied an old house (which is still standing) in New Street [Worcester], from which he escaped by the back door, as the enemy rushed in at the front."2023 January 11, Stephen Roberts, “Bradshaw's Britain: castles and cathedrals”, in RAIL, number 974, page 57:
2

A means of access, often secret and unprotected, to something.

  • Scoring three goals at home should guarantee you three points, but when you go on the attack a little bit more, you leave the back door open. That's not always a good idea with this team.2021 November 29, Alan Shearer, “Why Newcastle have to win their next two games to give them hope of staying in the Premier League - Alan Shearer analysis”, in BBC Sport:
3

A secret means of access to a program or system.

Computer security

4

Automotive, Transport, Vehicles A rear side door of a car, or at the back of a van.

5

Slang The anus (usually in sexual practices).

  • backdoor action
  • go up the back door
6

Broadly, Slang Anal sex.

  • Oh, don't be so judgmental. You could use a little back door.1998 June 28, Michael Patrick King, “Valley of the Twenty-Something Guys”, in Sex and the City, season 1, episode 4, spoken by Samantha:
7

Golf, Hobbies, Lifestyle, Sports Informal The rear side of the hole, furthest from the golfer.

  • Sometimes the ball will curve around and enter from the back-door.2010, Bob Glanville, Golf: The Game of Lessening Failures, page 14:
Antonyms
foredoor, front door
Related terms
back-door bandit, back-door man, back-door pilot
Hyponyms
bugdoor
Holonyms
backroom

back door

adj
1

Ball games, Baseball, Games, Hobbies, Lifestyle, Sports US The path of a pitch which starts outside and then slides over the plate.

  • He has a nasty back door slider.
2

Achieved through indirect means.

  • Lately there's been a lot of back door pressure on me to step down.
3

Card games, Poker Of a draw Requiring consecutive cards on the turn and river to be achieved.

  • The flop had the ace of spades, queen of spades, and two of diamonds, and I was holding the king of spades and the three of hearts. I bet big, hoping for a jack and a ten to make my back door straight-draw, or a spade to make my back door flush-draw. But when the turn card was the five of clubs, I had to fold.
Related terms
back door slider

back door

verb
1

To attempt to accomplish by indirect means, especially when direct means are proscribed.

2

Hobbies, Lifestyle, Sports, Surfing To enter a tube by accelerating from behind; to surf into an already formed hollow wave, in contrast to the normal method of slowing to allow a surfable wave to form.

  • If you survive the heavy take-off at 'The Chair' (which is very close to the rocks) you will find you're in 'The Suck-up', which offers either a spectacular barrel or a bonecrunching wipeout, but you might find you have to back door it.1999, Mark Warren, Mark Warren's Atlas of Australian Surfing, traveller's, →ISBN, page 103:
3

To add a backdoor (a secret means of access) to a program or system.

Computer security

  • Now that we have backdoored the notepad.exe binary, we will go back to the Meterpreter session and upload our backdoor: 3. Then, we need to start a listener so we. meterpreter > upload notepad-backdoored.exe [*] uploading[…]2018 February 26, Abhinav Singh, Nipun Jaswal, Monika Agarwal, Daniel Teixeira, Metasploit Penetration Testing Cookbook: Evade antiviruses, bypass firewalls, and exploit complex environments with the most widely used penetration testing framework, 3rd Edition, Packt Publishing Ltd, →ISBN, page 213:
  • As an example, the generation algorithm for backdoored Dual EC picks a fixed group element Q, a random exponent d, and outputs as public key the pair P = Qd and Q. The secret key is d. (We use multiplicative notation for simplicity.)[…]2015 April 13, Elisabeth Oswald, Marc Fischlin, Advances in Cryptology – EUROCRYPT 2015: 34th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Sofia, Bulgaria, April 26-30, 2015, Proceedings, Part I, Springer, →ISBN, page 103:
1 more example
  • Back in the session, we will rename the httpd.exe file to httpd.exe.backup, upload the backdoored version, and rename it to httpd.exe: msf exploit(handler) > sessions -i 1 [*] Starting interaction with 1... meterpreter > cd[…]2019 July 18, Gilberto Najera-Gutierrez, Juned Ahmed Ansari, Daniel Teixeira, Abhinav Singh, Improving your Penetration Testing Skills: Strengthen your defense against web attacks with Kali Linux and Metasploit, Packt Publishing Ltd, →ISBN, page 453:
4

Slang To betray (someone); to double-cross (someone); to set (someone) up; to take advantage of (someone's) trust.

Related terms
front door

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.