Definitions by Sewdonim
bing bong
the noise made by a motion sensor attached to doorways of various businesses to notify the employees someone has just entered the place of business (either to get their attention to assist customer or for security reasons). Often seen at dry cleaners
Family Guy episode shows Peter Griffen walking into a dry cleaners and upon entering the noise "bing bong" was made by door sensor. After annoying the owner of the dry cleaners by waving hand in front of the sensor just to hear constant "bing bongs," owner of the cleaners finally yells angrily "NO MORE BING-BONG!"