flash

noun

A sudden, brief burst of light or a quick, brilliant idea.

"There was a flash of lightning."

adjective

Ostentatious, showy, or expensive in a slightly vulgar way.

"He drives a very flash car."

verb

To shine or cause to shine brightly and suddenly.

"The lighthouse flashed its beam."

Thesaurus

Synonyms: flashing, flare, flashy, tacky, loud, trashy, tawdry, gaudy, gimcrack, brassy, meretricious, tatty