A fork of Rural Dictionary
You need find a random house, silently break into, locate random target, preferably female. When the target has been found, the aggressor then will be violently slapping with willy a victim over a face while she is sleeping. You are slapping her until she will wake up while singing "wake up call."
(Hotel reception, boss): "Do not forget to make a WAKE UP CALL in the morning!"
(Receptionist): "Do not worry, they will ake up with gladness!"
"You've just unleashed a WAKE UP CALL!"