When you jack off and shoot your load while you blow your ass horn.
Everything that comes out of his mouth is a jack fart.
by Macgman August 31, 2006
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the act of using your tongue to penetrate the anus of your partner during sexual foreplay
I want to tongue jack fart box

Matt: "Damn girl, I want to tongue jack your fart box!"

Jason: "She tongue jacked my fart box last night"

Raaaaaaandy: "Yes! I can tongue jack your fart box!"
by Brian, winona September 20, 2009
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The act of being lazy, or not doing what one is supposed to be doing, such as at a job.
"Quit fart-jacking around Bill, if we don't get this work done we're going to be fired".
by Jeano-Beano April 14, 2018
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The act of covertly farting right after someone else has farted so the original farter takes all the blame.
I know my fart did not smell like that did, you just FART-JACK me.

Someone in this car just Fart-Jacked me because I know that wasn't me.
by Brain Giggles April 4, 2017
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Jack fart: (V) to act like a complete goofball or turd shit
by Speed6 December 8, 2015
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