Top Definition
The heightened arousal factor from a sexual experience with someone the first time, that usually wanes thereafter
Girl #1: I'm getting bored with JP

Girl #2: You've only been with him three times!

Girl #1: I know, but everything after the first time is a downhill slide

Girl #2: You should just do one-nite stands then if you only get off on the First Time Factor

Girl #1: Yeah maybe
by February 01, 2010
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