One who looks too deeply into any situation, and often overanalyzes everything. A Seinfeldian way of thinking, the overthinker will find a motive behind all actions, and dwells on tones and bodylanguage rather than what is spoken.
Billy, don't be an overthinker, she just said hello and didn't mean anything otherwise.

Sometimes I feel like the way she hands me my paper just shows how much she digs me, or maybe i'm being an overthinker.

by clutch trotsky June 15, 2008

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