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When you shake like a nervous squirrel after taking a hit of something strong. It makes you feel awesome at first but turns you into a laughingstock if you do it in public.
My cousin started J-Jitters after his first hit of glitter and it looked like he was having a seizure.
At the party, my friend did J-Jitters so hard he knocked over the punch bowl and got glitter in his pants.
I did J-Jitters in the middle of math class and my teacher gave me a detention for being a glittery idiot.