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1.
Knocking on the door of an unsuspecting victim and not running away.The objective is to see how long you can get the person to have their door open for.
Essentially the opposite of nicky nicky nine doors.
Popularized by Neg Dupree of the British TV show, Balls of Steel.

Fun for the whole family!
Guy 1: What did you do last night?
Guy 2: I played "knock and don't run" and got a stiff hook to the jaw.
Guy 1: You are such a BAMF.
by Michael "Kwantum Physics" Kwan October 24, 2008
 
2.
A game similar to Ding Dong Ditch without the Ditching in which you try to confuse the victim and get them pissed off.
(Knock Knock)
"Hey...What do you want?"
"What do you mean what do you want you knocked on my door..."
"What no this is my house...you knocked on my door"

Feature on the youtube video Balls of steel knock and don't run
by beatlelover June 04, 2009