Top definition
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
Get a Knock-Knock Joke mug for your dad Abdul.
May 1 Word of the Day
When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.
I’m tired I wanna go home

“Oh I didn’t know it was pee pee poo poo hours”
by A7sa July 03, 2019
Get a pee pee poo poo hours mug for your guy Bob.
2
Child play for quire little boys on a street corner excepting that they will turn into crackheads later on in life. Most of them have nothing to look forward to.
Come on Paul lets get some knock knock jokes up in dis joint.
by Obama leader of the Democrats December 16, 2014
Get a knock knock jokes mug for your barber Beatrix.