1. a person who adopts or maintains a particular posture or position, especially one that is assumed for effect or appearance rather than being genuine
Usage: often used critically to describe someone who strikes an artificial pose

Examples

• He was dismissed as a posturist who cared more about looking cool than being authentic.
• The critic accused the artist of being a posturist rather than a true innovator.
• She rejected the label of posturist, insisting her beliefs were sincere.
• Many saw him as a posturist adopting radical positions to gain attention.
• The posturist's carefully curated image fell apart when his true nature was revealed.