20-Classic-Knock-Knock-Jokes-Photo18

 18. The Snacking Knock Knock

Knock knock
Who’s there?
Cash
Cash who?
No thanks, but I’ll take a peanut if you have one.

We suppose this one isn’t all that funny for people with nut allergies and, personally, we’d take a cashew over a peanut any day. But we’re not about to argue with a classicly scripted knock knock joke.