What’s the Lawyers version of “go get me the headlight fluid”?

You know that old joke that goes around blue collar workplaces? Getting the new guy to fetch you something or as k for something that doesn’t exist, but they don’t know that. There’s some great versions of this joke out there in the blue collar world. Carpenters and construction workers have the “board stretcher.” Mechanics and automotive techs have the “headlight fluid.” What’s a lawyer’s version of this? We have to have something we can do right?