Fashionable, expensive, impressive.
A Brit can see your Porsche and say, "That's a flash car."
This a shortcut for False eyelashes, False eyelashes are something girls and other genders glue onto their eyelids for their eyelashes to look bigger / etc for any purpose.
Can you buy me some flashes from the store and some flash glue? / Anita
Yeah OfCourse i can girl i gotchu, is this your first-time wearing flashes / Cornelia
"Did you see that streak?" "Of course you didn't, that was the Flash."
" I kept telling her to leave me alone and she wouldn't so I flashed"
The look of shock or curiosity a person (mostly females) gets on their face when exposed to the genitals of one of the opposite. Wide eyed hand covered open mouth, sometimes gasping. The intoxication that feeds exhibitionist.
‘OMG Susie, look at that guy flashing us; I’m so flash-eyed!’… blush
The act of sending a naked picture to someone else without being asked to via any digital means.
I was virtually flashing today. I sent a picture of my junk to a girl I met.