Robin: Holy cow!An expression used by a character in numerous episodes of a show. Merely uttering this phrase in the office will key others in to the character you're referring to. For a line to be a catchphrase, it should be always the same, and not just catchy. Note: To be a catchphrase, the phrase must be repeated multiple times — just because something is the most memorable line of a movie does not make it a catchphrase unless it is said more than once. If the character has a Badass Creed, that will probably double as a catch phrase. Beam Me Up, Scotty! is a false or oft-misquoted catchphrase. When the audience adopts a character's line as a catchphrase, then we get Memetic Mutation. A Super Trope to:
Batgirl: You just had to say that.
— The New Batman Adventures, "Critters"