flasher

American  

[flash-er] / ˈflæʃ ər /

noun

1. a person or thing that flashes.

2. a flashing flash light operated by a switching device that automatically turns it on and off alternately.

3. a signal light on an automotive vehicle that can be made to flash, as to indicate the intention of making a turn or to call attention to a vehicle that has slowed or stopped in a hazardous place.

4. the switching device that operates such a light.

5. Slang.  a person, especially a man, who exposes the genitals suddenly, and usually briefly, in public.

---

flasher British  

/ ˈflæʃə /

noun

1. something that flashes, such as a direction indicator on a vehicle

2. slang  a person who indecently exposes himself

---

Etymology

Origin of flasher

First recorded in 1605–15; flash + -er ¹

Example Sentences

“People on the sides of the road, emergency flashers going, bullet holes, windows shot out,” he said.

From BBC

I’m sure it was an annoyance to other drivers when we were driving 30 mph up hills with flashers on, but they safely and quietly passed us without a honk or sign of complaint.

From Seattle Times

Dave’s emergency flashers were on, and reports say he had activated his siren just seconds before impact.

From Seattle Times

Dave, who was responding to a report of a drug overdose, was traveling at 74 mph with his emergency flashers on.

From Seattle Times

The time and the place for spoons, flashers, dodgers and hoochies.

From Seattle Times