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A variation on the common term "jerk" that has become more personalized and trendy with the addition of the "o."

Similar to Lauguna Beach's "dunzo," a variation of the word "done," and "nutso," the better way of saying "nuts."

Blake ditches us for annoying girls; he's a jerko.
by Nutty123 April 19, 2006
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a jerko is a jerk but with an o like it makes it more special. basically a mean creep
by thepresprespres February 06, 2011
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