According to the Urban Dictionary:
The term cast members of Disneyworld and Disneyland have coined for season pass holders; specifically pass holders that frequent the parks on a weekly basis and behave like they own the place.
“Did you see that?! That little girl was about to trade her pins with a cast member and that Passhole knocked her out of the way. I bet he ordered his pins on eBay and they aren’t even stamped!”