The best dad jokes and puns on the internet.

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Knock-knock! Who's there? Cheetahs. Cheetahs who?

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[Walks up to coworker's desk] I know I don't say this often enough,

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My book on reverse psychology was just published.

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What is the biggest difference between chemistry and cooking?

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"HeHe," said the first chemist. "What's so funny?" asked the other.

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So I asked the dude next to me if he knew the chemical symbol for sodium hypobromite, and he was all like,

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I work for the world's biggest nanotechnology company.