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1.
when you're about to bone a chick, but circumstances prevent you from going in all the way
only your tip got wet
Dude, I was about to bone that chick, then her parents came home so I had to pull out before anything even happened. (nick job)

Female definition: Well, I'm a technical virgin, he only got halfway in and then my parents came home, so it was only a "nick-job."

Dialogue:
How many chicks have you boned? 10...no wait, 9.5
I "nick-jobbed" one of them.