Top Definition
The 'secret' competition between the fattest & next fattest person in a particular group. Either unmentioned/unnoticed by the subjects themselves. Scoring is done by peers.
Allen lost the bet when fattest girl Anita one-upped Bertha in the comFATition by taking only 125 minutes to run 2 laps in PE.
by catfight12 January 11, 2009
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