poser
1. [ noun ] (work) a person who poses for a photographer or painter or sculptor
Synonyms: model
Examples:

"the president didn't have time to be a model so the artist worked from photos"

Related terms: assistant artist's_model dressmaker's_model photographer's_model model
2. [ noun ] a person who habitually pretends to be something he is not
Synonyms: poseur
Related terms: exhibitionist poseuse pose
3. [ noun ] a particularly difficult or baffling question or problem
Synonyms: toughie sticker stumper
Related terms: problem stump
Similar spelling:   Pooser
  poker
  poseur
  Poucher
  poacher