Dad jokes
Knock-Knock
13 jokes, all of them clean
Knock-knock jokes are the only format on this site that needs the other person to participate. That is the entire mechanic and it is also why they are the first joke most people ever learn to tell.
Knock knock. Who's there? Interrupting cow. Interrupting co— MOO!
Knock knock. Who's there? Boo. Boo who? Aww, don't cry — it's only a joke!
Knock knock. Who's there? Lettuce. Lettuce who? Lettuce in, it's cold out here!
Knock knock. Who's there? Olive. Olive who? Olive you, and I miss you!
Knock knock. Who's there? Cow says. Cow says who? No, silly — cow says MOO!
Knock knock. Who's there? Banana. Banana who? Knock knock. Who's there? Banana. Banana who? Knock knock. Who's there? Orange. Orange who? Orange you glad I didn't say banana?
Knock knock. Who's there? Tank. Tank who? You're welcome!
Knock knock. Who's there? Hatch. Hatch who? Bless you!
Knock knock. Who's there? Dishes. Dishes who? Dishes the police — open up!
Knock knock. Who's there? Annie. Annie who? Annie thing you can do, I can do better!
Knock knock. Who's there? Justin. Justin who? Justin time for dinner!
Knock knock. Who's there? Broken pencil. Broken pencil who? Never mind, it's pointless.
Knock knock. Who's there? Ya. Ya who? Wow, I'm excited to see you too!
A joke with a script for 2 people
Every other joke here is a monologue. This one hands the listener 2 lines and makes them complicit in their own groan, which is a genuinely clever piece of design for something usually told by 6-year-olds. It also means the format teaches itself. A kid who hears 1 knock-knock joke knows the structure of all of them immediately, and will then produce roughly 40 bad ones.
The interrupting cow problem
The interrupting cow is the best knock-knock joke and it is the one that breaks the rules — it does not wait for the second line. That is worth noticing, because it means the format is strongest when it violates its own script. Most of the others on this page play it straight and land as gentle. Tell the cow one to somebody who thinks they have heard every knock-knock joke.
The one to actually use
The interrupting cow, and it wins by breaking the format. Every other joke on this page waits politely for the other person to say who. This one does not wait, and the whole joke is the interruption arriving early. That is worth noticing — the strongest version of a rigid format is usually the one that violates it. The banana and orange one is the other exception, and it works by being far too long on purpose.
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