flasher Meaning, Definition & Usage

  1. noun someone with a compulsive desire to expose the genitals
    exhibitionist.
  2. noun an electrical device that automatically turns a lamp on and off (as for an advertising display)
  3. noun a light that flashes on and off; used as a signal or to send messages
    blinker.

WordNet

Flash"er noun
Definitions
  1. One who, or that which, flashes.
  2. A man of more appearance of wit than reality. 3. an exhibitionist
  3. (Zoöl.) (a) A large sparoid fish of the Atlantic coast and all tropical seas (Lobotes Surinamensis). (b) The European red-backed shrile (Lanius collurio); -- called also flusher.

Webster 1913