When one has the desire to be intimately close to someone in a physical manner. Also when one thinks about another as a potential significant other (lover), often of the opposite sex.
David: How is things.
Bryan: Fine.
David: Bryan, how is things?
Bryan: Don't flatter yourself...i'm fine! Sophia was great, but by no means one of a kind. She was a proximity infatuation.

Bryan: Besides were friends right?
David(Tom): Right.

Jason Lee's honesty speech to Tom Cruise, in the movie Vanilla Sky in 2001. After Tom stole Jason's girl in the first half of the movie.

by Allen "Aames" Han January 6, 2008
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Herpes that can be contracted from simply being around the infected party.
"I would love to get it on with Ke$ha, but just being in the same room with her would give me Proximity Herpes"

Guy 1: "Hey, should I invite Tonya?"
Guy 2: "No dude! She has Proximity Herpes and would infect the whole party!"
by Zombie Josh April 7, 2010
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A bitch you may think is pretty hot when looking from a distance, but once you get a closer look, thats when it all blows up in your face and you realize, that bitch be UGLY!!!
That bitch is a proximity mine!

or

I eyed this bitch from across the bar, i went up to go talk to her and wow she was fucken ugly! I determined she was a proximity mine!
by HAZE8713 November 12, 2010
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Spending lots of time with an average or less than average looking girl and noticing that she is becoming hotter and hotter as time passes. This is presumably due to the fact that you feel that you should have slept with her based on the amount of time you have committed to the relationship.
Alex: Have you noticed how Rosie is looking a lot hotter these days?
Mark: Nah man - you've just been spending way too much time with her!
Alex: Really?
Mark: Yeah... it's Proximity Theory!
by DAO1428 October 23, 2013
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When you ask for help with your malfunctioning software, it will mysteriously start working only when the person you asked gets within 5 feet of the computer.
I tried printing this godamn pdf for over an hour. But only after IT came into my cube did it start working. Of course IT thought it was an I.D.10.T error, but it was proximity effect making me look gaytarded.
by generator x November 17, 2011
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The act of partaking in sexual interludes with someone while in the same room as a family member. Typically said family member is unaware of what is taking place, and is often asleep. However, it should be noted that if said family member becomes privy to what is taking place, and they do not leave the room, it just becomes real incest.

It is usually an act of desperation and due to lack of alternate venues.

Once a friend pioneers this maneuver, it is customary, and always considered good form, to ridicule them severely, and remind them that they committed proximity incest, and technically speaking, are now a sex offender.
Charlie totally boffed his cousin's friend Liana on the floor of his cousin's bedroom while staying at his aunt and uncle's house for Easter... he totally committed proximity incest.
by Lance Williams April 29, 2008
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When a penis gets hard from merely being in the same vicinity as a woman, even when there is no sexual cue whatsoever.

Similar to the sensors in sci-fi movies getting set off when another space ship comes into range.
She gave her boyfriend a hello hug at the restaurant. He covertly put her hand on his hard on. She laughed and said "proximity alert!"
by Vikyliz January 1, 2012
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