Top definition
1. When you take a jizz on someones guitar. Usually out of anger or jealously.

2. Also the act of forming your jizz onto a flat surface into the shape of a guitar.
1. Tom: "Man, that guy is a prick to me, I'm going to give him a jizztar sometime."

2. Teddy: "Hey, did you see that jizztar I made last night?"
Mary: "You're sick."
Teddy: "v_v"
by Darth_X April 17, 2008
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