1. To masturbate discreetly in your pants while they are still on.

2. To masturbate whilst being aroused by a hamburger.

3. To have a boner in your underwear (jocks).
1.I was feeling especially horny in the office today so I did a quick jack in the jocks and moved on with my day.

2. This burger is making me hungry for a jack in the jocks.

3. I woke up with a raging jack in the jocks this morning.
by Sup_Ladies October 24, 2014
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