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1 definition by quasidan2

 
1.
Originally a Batman marketing campaign, "why so serious" can be used as a response to someone taking themselves or a particular topic too personally or seriously.
-"Crunchy peanut butter is the ONLY way to go and anyone who eats creamy is a loser."
-"why so serious"
by quasidan2 July 11, 2008
295 66