Fast way to screw up someone's Knock Knock joke...? "It's open."
Knock knock! Who's there? Yah! Yah who? Naaah, bro, I prefer google.
Knock knock. Who's there? Sarah. Sarah who? Sarah problem here?
Knock Knock. Who's there! Ice cream! Ice cream who? Ice cream if you don't let me in!
One day a man heard knocking at his door. He opened the door only to see a small snail sitting there smiling. The guy picked the snail up and threw it as far as he possibly could. Three years later he heard knocking at the door again. He opened the door to see the snail. The snail said, "What the hell was that all about?"
Knock Knock. Who's there? Opportunity. Don't be silly - opportunity doesn't knock twice!
Knock Knock! Who's There? Figs Figs who? Figs the doorbell, it's broken!
"Knock, knock.Who's there?" very long pause... "Java."
Knock Knock! Who's there? Zany Zany who? Zany body home?
Q: Why can't you tell blondes knock-knock jokes? A: Because they leave to go answer the door.
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