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The act of a certain franchise, becoming worse. This usually is followed by a decrease in popularity aswell as further depletion of customers or fans.

(see Mark Sanchez)
Lets get out of here it's turning into a sanchize
by Redeeesh January 16, 2011
The decision of Jets ownership to name Mark Sanchez as the franchise quarterback thus ensuring the ruination of the team.
All of the NFL now trembles in fear of the Sanchize.
by jetsfan1234 December 05, 2012