For those (non-natives, etc.) who maybe aren't familiar, knock-knock jokes are one of the lowest, most basic forms of American "comedy". They follow this format:
- A: Knock, knock
- B: Who's there?
- A: [Something]
- B: [Something] who?
- A: [Dumb punchline]
Here's an example:
- A: Knock, knock
- B: Who's there?
- A: "Boo"
- B: "Boo" who?
- A: It's just me, you don't have to cry. → さぁ〜〜〜むッ!
注:「"Boo" who」とは「Boo hoo」の同音で、「Boo hoo」とは英語の泣き[喚]{わめ}きの擬声語。
You can make up just about anything and fit it into the format of a knock-knock joke.
So does Japanese have some similar ubiquitous format for making easy "jokes"?