When a women or man (the 'doorbellee') bends over on all fours and you (the 'doorbeller') approach from behind and, with the index finger extended, press on the rectum and then slowly insert the finger, as if ringing a 'doorbell'.
"Stacey was not aware that Nich was present while she was bent over reading a magazine on the floor in the nude until he approached her from behind and rang "The Doorbell."
When someone in a car sits in the driveway or on the street and rudely honks their horn to signal someone to come out to them, instead of getting out of the car and going to the door to knock or ring the doorbell.
Cletus had to annoy all the neighbors by using the Tennessee doorbell to get Billy Bob to come get in his car. Why can't that fat hillbilly idiot get out of his car and knock like civilized people do?