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.
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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!"
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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".
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.
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Jack fart: (V) to act like a complete goofball or turd shit
*Football team messing around*
Coach: STOP JACK FARTING AROUND!