poseur
/poʊˈzɜr/
noun
- A person who behaves or dresses in a certain way to impress others, often pretending to have more knowledge, taste, or sophistication than they really have.
- The poetry club was full of poseurs who quoted lines they didn't understand.
- She called him a poseur for pretending to love classical music when he only listened to pop.
- He bought expensive wine just to look like a connoisseur, but everyone knew he was a poseur.