Top definition
an unwanted person who knocks on your door and when you dont answer they just walk on in.
OR
an annoying who knocks on your door and doesnt wait for you to answer before walking in
John: I was in the bathroom, and I heard a knock on the door.

Paul: Did you answer it?

John: Shelli walked in before I could say I was in there.

Paul: What a knockenwalker.
by Scott Ploik August 06, 2010
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