He's the third guy at a gang bang that has no place to enter, has to jerk it to stay "in the game" while two dudes are plowing some chick, then gets hit by friendly fire, never gets "in the game", and mopes his way home with blue balls...
Cory was excited to be invited to the gang bang, but as things progressed he just ended up the Jizz-Moper.
A person whom society would judge to have a very bad/undesirable job.
Such as a jizz moper at a peep show
whos job is to keep up boths of semen before the next customer
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.