Knock knock
Who's there?
Double.
Double who?
W!
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Knock knock.
Who's there?
FBI.
FB…
We are asking the questions here!
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Knock, knock
Who's there?
I'm Mr, Farter.
Mr, Farter who?
I've brought some insecticides to give to your mother in law!
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Did you hear about the guy who invented the knock knock joke?
He won the "no-bell" prize!
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Knock knock.
Who's there?
Hatch.
Hatch who?
Bless you.
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Knock Knock.
Who's there!
Ice cream!
Ice cream who?
Ice cream if you don't let me in!
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Knock knock.
Who's there?
Cash.
Cash who?
Yes! I've always known you were a bit nutty!
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Knock Knock
Who's there?
Muffikin
Muffikin who?
Muffikin fingers are trapped in the door.
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Knock Knock.
Who's there?
Opportunity.
Don't be silly - opportunity doesn't knock twice!
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Knock, knock.
Who's there?
Owls say.
Owls say who?
Yep, that they do.
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Fast way to screw up someone's Knock Knock joke...?
"It's open."
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