flash
/ˈflash/
verb
rush, dash —used of flowing water
to break forth in or like a sudden flame or flare
to appear suddenly
noun
a sudden burst of light
a movement of a flag in signaling
a sudden and often brilliant burst
adjective
flashy, showy
of, relating to, or characteristic of flashy people or things
of, relating to, or characteristic of persons considered social outcasts
flash behavior