We all love a great knock knock joke. But do you know where the phrase “knock knock, who’s there” originated from? It was actually Shakespeare, in Macbeth.
Here’s a knocking indeed! If a man were porter of Hell Gate,
he should have old turning the key. [Knock] Knock, knock,
knock! Who’s there, i’ th’ name of Belzebub? . . . [Knock] Knock,
knock! Who’s there, in th’ other devil’s name?
Act 2, Scene 3, 1-8
Even though this phrase was not meant as a joke in Macbeth, we can still thank our good friend Shakespeare for this great quote.