The kid who is supposed to be in 7th grade, but is doing pre-calculus and makes you feel like a complete idiot. He is always blurting out random facts and proving that you are wrong. Says "accurate" way too much.
Ethan- "That guy makes me feel like an idiot"
Lucy- "he must be a Coolsjes"
12 step recovery jargon referring to someone new who talks about how great life is, now that they're sober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.