concessionist

Someone who works in concessions-- typically at a movie theatre. It's technically not a word according to most dictionaries, and usually gets the red squiggly line from most spell-checkers; but you can refer to this unofficial definition as your own little victory knowing that, as far as the rest of the world is concerned, it's a real word.

Harvard Grad: Excuse me, but a girl who works in your concessions spit in my cup before serving it to me.
Management: Don't you mean a concessionist?
Harvard Grad: That's not a fucking word you imbecile.
Management: (begins making a loogie)...let me see that cup.

by Douglas Young December 2, 2007