Top Definition
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 December 31, 2011

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×