by Anonymous September 21, 2003
Jacking off prior to the actual desired ejaculation time - the goal being to cut down the time required when actually finishing the job.
He didn't think she was actually going to do the trick, so he started pre-jacking while she was in the bathroom.
by bestnarcolepsyever March 16, 2009
Clear substance which precludes sex. Often causing squigy-ness in one's shorts, leading to your hammer sticking to your gitch.
ex.1
Guy: You don't have to spit baby!, just use the pre-jack!
Girl: yeah!
ex.2
Girl: Shit, did you cum already!!?!?!
Guy: Naa, Girl, it's just a lil pre-jack... fap.
Guy: You don't have to spit baby!, just use the pre-jack!
Girl: yeah!
ex.2
Girl: Shit, did you cum already!!?!?!
Guy: Naa, Girl, it's just a lil pre-jack... fap.
by Bejnay March 11, 2009
girl 1: i heard you had sex with your boyfriend for the first time last night.
girl 2: ya i did
girl 1: well? how was it?
girl 2:... he has pre jack
girl 2: ya i did
girl 1: well? how was it?
girl 2:... he has pre jack
by dreadlockmamba January 12, 2011