When you have multiple consecutive farts in the same pattern as the starting sequence of a Mario Kart race.
John: pft pfft pfft PFFFFTTTTTTTT!

Jake: "Dude that was a sick nasty Mario Kart fart!"
by racer010 March 20, 2010
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when you fart, then all of a sudden it picks up speed
I just had a Mario kart fart
Cause I swear it was coming and boom, it must have caught a mushroom or some speed arrows
weird
by Kid Ji October 3, 2008
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