Attempting to perform (or make the sound of) someone jacking-off at an immense speed.
"I heard my parents come in the house, so i began speed jacking to finish quickly."
by Capt. Ginger July 2, 2017
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When running late but still have the urge to rub one out.
Sorry I'm late but I had to do a Daytona Speed Jack.
by Pussy Beavers November 15, 2020
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Hunky ass man who is 6’1 and buff af but still hasn’t kissed a girl (which is honestly surprising). He usually looks 5 years older than he is, and it is concerning how fast he hit puberty . An idiot, hunk, and all around train wreck is just a few ways to describe a Jack Speed.
Is that Jack Speed over there? He looks like he is 35 and has a full time job with 3 kids and a hot wife.
by imonderrise November 9, 2019
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