In wrestling context, a "Dolph Ziggler" is a wrestler that constantly loses matches and is overrated. Being a "Dolph Ziggler" simply implies to be a "jobber". Some people may also refer to these jobbers as "Zack Ryder's".
Examples:

Typical CM Punk fan (IWC fan): "Oh shit, Dolph Ziggler lost again! He deserves to be World Heavyweight Champion! He and CM Punk are the best wrestlers ever!

Attitude Era Fan: "Meh... He is a jobber..."
by DarkPaul March 25, 2013
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