A mechanical device designed to interrupt the electrical current in a sign at regular intervals, turning the light source on and off to create a flashing image
an illusion of flashing light created when the vitreous gel, which fills the inside of the eye, rubs or pulls on the retina For more information, read "Floaters and Flashers" in the MD Support Library
A flasher is a man who deliberately exposes his genitals to people in public places, especially in front of women. a man who shows his sexual organs to women in public flash