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Getting or giving the biggest chunk of gross bodily fluid from someone else. Like you’re covered in it or you’re the one throwing it everywhere. It’s like being hit by a firehose of cum. It’s also when something is so awesome it makes your brain explode.
I j’ed on my best friend during math class and it was the best day ever.
She j’ed on me in front of the whole school and I still can’t look her in the eye.
That new video game? I j’ed on it so hard I got a brain freeze.