You pick a random slang term from the deck and everyone writes a made up but convincing definition for the word and anonymously hands it in. One person reads all the definitions aloud, including the actual definition of the word, which is randomly mixed in. Everyone guesses which definition is the real one and get points if they do. They usually fall for someone else's bullshit definition -- which earns its author a point. Differences to regular balderdash would be more of a party-game for the adult crowd, adult-material.