knock knock joke, n.All

The Knock knock joke is a door able.

The Knock knock joke is an indirect way to teach children to ask who's at the door.

The Knock knock joke is audience-participation punning.

The Knock knock joke is interactive punning

What award did the inventor of knock knock jokes get?The No-bell prize

The Knock knock joke is a long-form pun.

Knock-knock. Who's there? Heidegger. Heidegger who? Knock-knock. Who's there? Heidegger. Heidegger who? Knock-knock. Who's there? Arendt. Arendt who? Arendt you glad I didn't say Heidegger?

The Knock knock joke is like children with cancer; they never get old.

The Knock knock joke is a bad pun with a forced set up

The Knock knock joke is a subtle jab at homeless people