The adjective ostentatious means something or someone who is showing off their money, possession or power to impress people.
Synonyms are flashy, classy, glittery, or vulgar.
The word origins from 1701. It comes from ostentation plus –ous. Earlier it was used in a similar sense as ostentative (16th century).
Jake’s ostentatious behavior to impress his lover lead to their breakup.
Some women admire a man who is less ostentatious.
“Being ostentatious may lead to trouble”, the advice of an old man to a young boy who wears many expensive things.