While one is having sexual intercourse with his girl and they are fucking but while his penis is in her he grabs the end of it and "shakes hands with mr. happy" until he climaxes.
Friend: "Hey man what did you do last night, you look exhausted"
You: "Oh well man, Jack-In-The-Box came pretty "handy" last night near the "end" of my session with my wife."
by Scott#@!@#! October 29, 2008
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The act of taking an aborted fetus and inserting it into a girls rectum. Then when your friend is having sex with her, you run out and jump on her stomach, revealing the suprise.
My little brother was being annoying so i gave him a jack in the box.

When I gave him a jack in the box, he had sex with jack.
by A-jizzle-jizzinmamouth December 15, 2008
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Worthless fucktard that derives his pleasure from ruining everything.
Player: "Shit! That Jack-in-the-Box Zombie blew up my Gloom-shrooms!"
by Toadstars September 10, 2022
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You are recieving a rim job when you shart in the rimer's mouth with great force
Hey man, last night i gave her the Jacksonville jack in a box and she loved it.
by Spawj May 20, 2014
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sex
penis=jack, vagina=box
after the party i went over to jill's and we stayed up all night playing jack in the box
by jojo548 November 29, 2008
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When a person looks good in Myspce but when you see that person in real life looks ugly as shit.
She looked prettier in that pic but in real life? man I almost threw up
-Myspace Jack In The Box
by LA Lakers March 20, 2008
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When one takes Adderall when one is still half asleep, whilst setting one's alarm to go off ten minutes into the future. When the alarm goes off, one will find oneself jumping up, suddenly wide awake. Popping up out of one's bed like that fey, much-celebrated children's toy of yesteryear.
Jack: Give me some of your 10 mg generics, I am going to need to pull a Jack-in-the-box this morning.
by skullskratching-soulsearching December 31, 2014
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