La pige

(la) pige (pronounced peej), in journalism jargon, refers to freelance work:
travailller à la pige , faire des piges = to do freelance work

Also, slang for a year:
il a quarante piges = he's forty years-old

The verb piger is slang for to understand
Tu as pigé? = Did you get it?
Je n'y pige rien = I haven't got a clue, I'm clueless