One who has the deadly disease of jerkin their mckurkin.
Guy 1: Man, thats the 4th time ive jerked off today.
Guy 2: Dude, i think you have jerkitism.
Guy 1: Is that bad?!
Guy 2: Nope. I have it too.
by KimmieHasHardNipples August 27, 2009
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The amount of "jerk" an individual possesses.

The scale in which they measure "jerking" competitions.
"You have too much jerkitivity going on right now and you need to calm it down."

The Power Rangers' jerkitivity in on a scale of 8 out of 10. Great job!
by Yemyl November 13, 2011
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