Your forehead is so big, if you fell, you would knock out your whole state cold.
Some kid with parents: "Knock, knock."
Orphan: "Who's there?"
Some kid with parents: "Not your parents."
Knock knock.
Who's there?
You.
You who?
Don't you get it? You're the joke, dumbass!
"Knock knock."
"Who's there?"
"Bagel."
"Bagel who?"
"Toast, it's me, your arch-nemesis, Bagel, here to make up! Bye!"
Knock, knock.
(Who’s there?)
Roger.
(Roger who?)
Roger walks away, silently sobbing, having realized his mother’s Alzheimer’s is getting worse!
Why did the chicken cross the road? To visit the idiot.
Knock knock.
Who's there?
The chicken.
The chicken who?
*Silence*
Knock knock. Who's there? Jo. Jo who? Jo Auntie.
Sally jumped out a plane, she forgot her parachute!
Knock knock.
Who's there?
Not Sally...
How did she die?
A bomb came down whilst falling through the sky.
Knock knock.
Who's there?
A bomb.
What did the man say when he knocked down the bookshelf?
Looks like I've only got myself to blame...
Knock knock.
A joke.
U.
Knock knock? Who's there? Kanga. Kanga who? Not kangawho, kangaroo!
The exam is knocking at my door... so I ran away from the window.
Knock knock.
Who's there?
Orphan.
Orphan who?
Are you my mommy?
Me: Knock, knock.
Teacher: Who is there?
Me: Boo.
Teacher: Boo who?
Me: Stop being a crybaby and open the door!
Teacher: ......
Me: Aw man, detention again.
Knock knock. Who's there? Hal. Hal who? Hal will you know if you don't open the door?
Knock knock.
Who's there?
The butt.
The butt who?
The butt goes mooooo!
Knock, knock.
Who's there?
Stranger.
Stranger who?
Stranger, why are you in my house masticating my apparent dead wife?
Knock knock. Hwoo's there? Far from home. Hwoo's far from home? Spider-Man.
Knock knock!
Who's there?
Doctor.
Doctor who?
Why did the octopus cross the road?
To get to the douchebag's house.
Knock knock.
(It's the octopus.)