Top Definition
1) Derived from "fucking genius"
2) Primarily meant as a derogatory response to someone who has stated the obvious (duh!)
3) Proper reaction for anyone injured by doing something stupid like play real-life frogger (Darwinians).
4)Used to express genuine admiration for intelligence (seldom used).
The fingenius stuck his head in the tiger's mouth!
by ad-92129 November 14, 2011

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