Top Definition
A brilliant idea that you come up with that you later find out that someone else has already thought of.

Coined by 710 KIRO AM radio host Luke Burbank on the show "Too Beautiful To Live."
1.Coming up with a word or phrase that you think is really funny and original such as dudety. To describe male nudity in a film. Then finding out later that you just have Sharedbrain Syndrome.

2.I had this great idea the other day but i guess it was just sharedbrain syndrome.
by Fritztheten April 29, 2008

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