Definition of posers:
(n) :
(derogatory, slang) A poseur; someone who affects some behaviour, style, attitude or other condition, often to impress or influence others.
(n) :
Someone who, or something which, poses; a person who sets their body in a fixed position, such as for photography or painting.
(n) :
Someone who asks a question or sets a problem.
(n) :
(British) A particularly difficult question or puzzle.
(n) :
A surname from German