When someone obsessively and methodically secures an object, home, shed, camper or house boat with several locks (or screws) so that it’s impossible to be broken into or stolen. Such as putting a lock or locks on a lock. Originally coined in reference to Jack Smith of Arkansas.
That grill isn't going anywhere now that I've Jack-rigged it....
by Miss Prissy Pants May 25, 2010
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Working out in the gym, exercising in the park, cross-fit, basically any form of exertion intended for fitness towards making their body more appealing.
Where is Dan?

Oh, he's downstairs in the gym jacking his rig.
by BulawayoBob July 5, 2019
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