The art of performing oral sex or a hand-job to sleeping man without causing him to wake. A proper magic jack should involve clean-up as well, leaving the reciepient all but unknowing of the night's transgressions.
I woke up feeling great this morning, even after 16 Budweisers and a handle of Beam. On cloud nine all day, couldn't figure it out. Then my girl told me she magic jacked me after I passed out last night! Mystery solved!
by Beatsauce June 4, 2009
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Masturbating in a 40 year old overflowing, shit piled high beyond seat rim, outhouse without puking.
After being in the woods for a week with only straight men and Mormons he had to go magic jack.
by Jbondage069 May 20, 2011
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The Reverse Magic Jack is akin to the Magic Jack, but whereas the Magic Jack involves a guy getting his unit worked whilst he is unconscious, in the Reverse Magic Jack, the Jackee enlists the help of an unconscious Jacker to stroke his unit for him.
John awoke with a nice stiffie, but his girl was fast asleep. Rather than beat his own meat, John guided her hand into position, and Reverse Magic Jack happiness ensued.
by 165er February 20, 2014
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An erect penis. Made famous by Jonathon Moxon in Varsity Blues.
Friend 1: I wonder what another word for an erection is?

Friend 2: How about Jack's Magic Beanstalk?
by !@Nn34 March 3, 2022
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