by Knoitall March 04, 2014
An unexpected interruption (usually by a figure of authority) during an intimate moment in the backseat of a vehicle, or other public place.
Ashlee and Duke had their privacy invaded with a knock of shock, as they were getting busy in the back of his car.
by A cat and a flamingo August 05, 2007
Used if a prior arrangement is terminated by either party usually due to laziness, a lack of interest or tiredness.
Turn it in
Turn it in
Joe - "You still wanna go to the club tonight?"
Pete - "Nah, knock it on the head mate, im too tired!"
Pete - "Nah, knock it on the head mate, im too tired!"
by Wibbsy October 03, 2003
When you knock on someone's door and run away so you mess with their heads and they think they imagined it.
by Flickoh February 23, 2006
by BigFishyBob March 25, 2007
by Grove street March 18, 2018
When a topless or nearly topless woman's breasts are slapping together, caused by a back and forth motion during vigorous activities, such as sex or jogging
by Mouse3008 May 24, 2015