1 definition by Harrison Ziv

Top Definition
A word used to describe a hyper, A.D.D., six-year-old-like behaviour.

Can be shortened to the word "syns."
That kid watching Pokemon is so syndrome.

Your little brother is so syndrome, he tried to stab me with a plastic Power Ranger sword.

Tell your syndrome friend to stop breaking things in my room.

He is so syns.
by Harrison Ziv July 18, 2006

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