flasher

plural flashers

1. Anything that flashes, especially a device that switches a light on and off.
2. automotiveAn indicator or turn signal.

   Look here, look at this fire truck! It has flashers and sirens, and if you push the button at the bottom, it moves by itself.

   2019, Abby Chava Stein, Becoming Eve, Seal Press, page 13

3. obsoleteSomeone of great accomplishments, or brilliant appearance.

   Mr Yorke of D'Affrenalli has been introduced to me as a Wit & a Flasher: it was supposed that we were to admire one another's Abilities,—but I fancy the Project failed on both Sides […].

   1795 March 17, Hester Piozzi, Thraliana

4. slangSomeone who exposes themselves indecently; someone who ‘flashes’ their genitals.

   The only diversions I recall were a pair of Avocets flying over, and a young lady who regularly each afternoon furtively crept into the dunes [...] and crouched down for a clandestine wee! Either that, or she was a very shy flasher.

   1983, Bill Oddie, Gone Birding, London: Methuen, page 128

1. A city in North Dakota.

plural Flashers

1. informalcomputingA software developer who uses the Flash multimedia technology.

   JavaScript is an appealing solution for Flashers because it operates in the same client-side environment […]

   2001, P. S. Woods, Macromedia Flash 5 Developer's Guide, page 184