Definition from Wiktionary, the free dictionary
- IPA: /poʊˈzʊər/
poseur (plural poseurs)
- One who affects some behaviour, style, attitude or other condition, often to impress or influence others.
- He pretends draping things in miles of cloth is art, and that he’s an artist, but it’s always the same gimmick with different details, and he’s just a poseur.
- She only dresses like that because she thinks she is getting the boys' attention; she doesn’t even like the clothes. She’s such a poseur.
one who affects some behaviour, style, attitude or other condition, often to impress or influence others
See also 
poseur m (plural poseursposeuse)