Timmy and Mr. Burkenbakke in “Unfinished Business”

[to Mr. Burkenbakke] Mr. Burkenbakke? What are you doing with this garage sale? There's no garage.

Of course not. I'm a teacher. I can't afford a garage. It's a "I Don't Have a Garage" garage sale. I don't make "Crocker" money.

[reading a sign] Make Smoof, Not War? What's "smoof"?

Only the most naturally recurring material on Earth, little dude.

How come I've never heard of it?

Because, "the man" doesn't want you to.