1. (

• poseur ,
• poser ,

) a person who habitually pretends to be something he is not ;

2. (

• model ,
• poser

) a person who poses for a photographer or painter or sculptor; "the president didn't have time to be a model so the artist worked from photos" ;

3. (

• poser ,
• stumper ,
• toughie ,
• sticker ,

) a particularly difficult or baffling question or problem ;