Euphemism for masturbation. Combines a verbal allusion (jacking off) with a classic literary allusion (Jack and the Beanstalk).

Variant: "jacking the beanstalk" This variant makes use of the full, proper gerund suffix of ing - making it the preferred usage form in public and at formal gatherings, including at work, holiday and family celebrations, and when talking with grandparents, priests, co-workers, neighbors, and medical professionals such as doctors and nurses.
Ex: I don't know why Eriq doesn't lock his door; this is the 10th time I've walked in on him while he was hunched over the computer jackin' the beanstalk.

Ex. She's out of town, so I've taken matters into my own hands and been jackin' the beanstalk like a shedevil in heat.
by JNinWeHo November 7, 2022
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When a short person hooks up with a person tall enough to be called a giant.
Why do girls like basketball players? They just want to see what its like to Climb The Beanstalk.
by 6'11" Giant June 15, 2009
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Jack and the beanstalk: when a mans penis enters a vagina un-erect (planting the seed), then he becomes erect once inside (the beanstalk grows).
by Ussas xx1987 November 11, 2019
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stimulating an erect penis until it reaches climax/cums

can be a hand job or masturbation/jerking off
jack slid up and down the bean stalk until there were clouds in the sky and the beanstalk fell limply to the ground <--playing jack and the beanstalk
by jojo548 November 30, 2008
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a pun from jack and the beanstalk
used in any context and it's meant to be funny
"so how does jack and the beanstalk go again?"
"oh it was like, jACK! END THE BEANSTALK! CHOP OFF ITS BIG ASS STALK PLEASE!"
by illusionations January 24, 2019
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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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a term used to describe the results of consuming better than average dope.
I'm trying to grow a giant beanstalk, got any of those magic beans like the other day?

did you know that you can smoke magic beans?
They grow giant beanstalks when you do.
by PseudoHigh February 10, 2012
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