/Jak/./En/./Tha/./Baks/ adj. 1. To drop in on someone completely unannounced thus upsetting them or potentially ruining something. 2. Dropping in without calling. 3. Showing up unannounced and fucking everything up.
1. He was about to get some from girl on the side but his woman Jack in the boxed his ass.
2. I was sleeping like a baby till I got jack in the boxed by that douche Bobby.
2. I was sleeping like a baby till I got jack in the boxed by that douche Bobby.
by Soulsurvivor_2001 March 08, 2006
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."
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
by Toadstars September 10, 2022
by Spawj May 20, 2014
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.
When I gave him a jack in the box, he had sex with jack.
by A-jizzle-jizzinmamouth December 15, 2008
by jojo548 November 29, 2008
by LA Lakers March 20, 2008