Definition of "flasher" []

• A device that automatically switches an electric lamp off and on, as in a commercial display sign. (noun)
• Slang One who engages in indecent exposure; an exhibitionist. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• ""A lot of times, it's evidence that will take you to your next step in the investigative lead, so it will tell us who this person has been in touch with or who they've been emailing or texting," said Richard Mislan, Ph. D., a cyber-forensic researcher at Purdue University in West Lafayette, Ind. To help dig up digital evidence and catch criminals, cyber-forensic researchers use a device called a flasher box."
• "It's always an awkward moment when a toddler enters his "flasher" phase."
• "This kind of flasher, along with most animated and large signage along Route 66 in Albuquerque was eliminated as a result of LadyBird Johnson's "beautify America" campaign."