He was always seen as a pretentious poseur, trying too hard to impress others.
Her friends saw through her facade and realized she was just a phony poseur.
His attempt to fit in with the cool crowd came off as fake poseur behavior.
She was so self-absorbed that she didn't realize everyone saw her as a poseur.
He thought he was being edgy, but to everyone else, he was just a poser poseur.