a misguided attempt to explain the origins of the word fuck(which is most likely germanic). sometimes said to stand for "Fornication Under Consent of King" or "For Unlawful Carnal Knowledge", both of which are false.
This stands for: Always Silently Shut Doors In Case of Kleptomaniacs, and it is a method to prevent burglary. It is introduced by Sergeant Anous for Smosh Productions.