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1. Knock-Knock Joke
A joke made about a caller at the door. It usually ends up as a play on words.

The structure of a knock-knock joke is as follows:

Person 1: Knock-knock.

Person 2: Who's there?

Person 1: (Phrase A).

Person 2: '(Phrase A)' who?

Person 1: (Phrase A) (funny punch line).
Here is a knock-knock joke:

George: Knock-knock.

Reginald: Who's there?

George: Em.

Reginald: 'Em' who?

George: Emphysema! So you better quit smoking!
by Diggity Monkeez May 19, 2005 add a video
2. Anti-Joke
A joke or riddle-joke that starts like a standard joke or riddle-joke, but then turns out not to be a joke at all. The surprise element thus becoming the joke.
A standard joke turned into Anti-Joke:
A man walks into a bar. His alcohol problem is destroying his family.

Riddle joke turned into Anti-Joke:
Q: How many blondes does it take to screw in a lightbulb?
A: It shouldn't take more than one person to do this task, regardless of hair color.

Knock Knock joke turned into Anti-Joke
"Knock knock"
"Who's there?"
"It's the police. There has been an accident. Your wife is in intensive care"
3. argo
the key word in a classic "knock-knock" joke.
pat: knock-knock!
nat: who's there?
pat: argo.
nat: argo who?
pat: ARGO FUCK YOURSELF!!!
4. Anti Joke
A type of joke that is not a joke at all. It is just a surprising twist on a joke. Kinda like a big middle finger to the face.
Here are some Anti Jokes
Joke:
Your mom is so fat that when she dives into a pool she displaces a proportionately larger volume of water than people with less body mass.

Question:
Why did the boy drop his ice cream?
Because he was hit by a bus.

Knock-Knock Joke:
Knock Knock

Who's there?

The police, your entire family died in a car accident
5. Tiny fucked a stump
A seemingly meaningless, probably inside joke found in the special features section of Rob Zombie's "house of 1000 corpses". It features the cast of the movie telling a knock knock joke that makes little sense.
Baby- Knock Knock
Otis-who's there?
Baby-fish boy
Otis-fish boy who?
Baby-Tiny fucked a stump!
me-???

knock knock
whos's there?
stump
stump who?
FUCK ME TINY, FUCK ME!
6. joke-etiquette
The concept that when presented with the set-up for a joke, the listener willingly moves the joke forward toward the punch-line in a timely manner. Poor joke-etiquette refers to the practice of the listener attempting to figure out the punchline or delaying the telling in order to steal the teller's thunder, thus spoiling his/her efforts.
An example of good joke-etiquette.
bob: knock, knock.
neil: who's there? (=good joke-etiquette)
bob: go fuck yourself!

An example of poor joke-etiquette.
bob: knock, knock.
neil: go fuck yourself, I hate knock, knock jokes! (=poor joke-etiquette.)

7. nuck nuck
A formal way of greeting amongst brothers. Also a synonym for the classic knock knock joke.
Nuck Nuck
Who's there?
MAAHHH NUCKA!
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