Jason Spezza
A Word or name to describe ones inability to do anything good or correct. It is used to let the person know who is doing something dumb that they are being a complete plug and useless human being.

This word is named after a hockey player who is a slow and plug like individual who does not add any value to his team during the playoffs.
Shut up Spezza!
That was such a jason spezza thing to say (or do).

Wow spezza what are you good for?

Roughly translated these all mean that the individual is being useless and a plug.