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1.
A repfag is somebody who really cares about their reputation online.

Wither it be a Youtube account, facebook, Xbox Live, Steam etc. repfags will take hissy fits if somebody accidentally, or deliberately, uses their account.
Guy 1 - "Hey, I'm just going to go on steam for a moment."

Guy 2 - "NO NO! NOT ON MY ACCOUNT!"

Guy 1 - "Why not?"

Guy 2 - "BECAUSE I HAVE A REPUTATION TO UPHOLD!"

Guy 1 - "You are such a repfag..."
by Har-Har December 05, 2009
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