Epic joke told by character Carl Hanratty (Tom Hanks) in 2002's "Catch Me If You Can".

When someone goes to the gym and spends 90% of the time on their phones scrolling through social media

"Knock. Knock." Is a term used primarily by hackers and they send them to their victims who they are about to swat usualy on Twitter or private message.

Popular children's game derived from William Shakespear's "Macbeth" - Act 2, Scene 3, line 7, "Knock, knock! Who's there, in th'other devil's name?.."

A fun game in which the participant stands outside a closed door where someone is sleeping. The player pulls out his penis and begins to masturbate. He must stand close enough to the door so his hand knocks on the door as he masturbates. The aim of this fun game is to get off before the sleeping occupants wake up and come to see what all the noise is. While the player technically loses if the occupant comes out of the room too early, the player may be able to get sex out of the occupant should it be an attractive female.

slang for Jehova's Witnesses. Due to the fact that they come knocking on your door almost every damn saturday morning when ur trying to watch cartoons or eat breakfast. They feel compelled to interrupt your important free weekend morning by telling you about how god loves you and such.

Term used by the BSP crew when refering to anything negative. Mainly used when no other term will suffice.