Top Definition
Pertaining to someone who likes to flaunt his "intelligence," but then does something that would lead anyone to believe that he/she is a total moron.
Dang I felt so Sivvy today when I tried to go out the "in" door on that bus and got lost in downtown London for HOURS. I wish I had seen the sign or listened to the people describing which door was for which direction or moved with all of the people I was with.
by mordy91 March 15, 2009
when someone does something entirely typical and expected of them.
Person 1: Laura's late again.
Person 2: Sivvy, much?
by alisev August 01, 2008
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