The term 'Disco Flasher' is a reference to a strobe light, which is a device used to produce regular flashes of light. It is commonly used in discos and other venues to create an atmosphere of excitement and energy. The term 'strobe' is derived from the Greek word for 'LIGHTNING, ' and it is often used to describe the effect of the light. Strobe lights are also used in photography and cinematography to capture motion in still images.