There are 2 main definitions of poser in English:

poser1

Line breaks: poser
Pronunciation: /ˈpəʊzə
 
/

noun

A person who poses; a poseur.
More example sentences
  • ‘Canned hunts’ are for phonies and posers and dandy boys.
  • Some people see cyclists as posers with their skin-tight brightly coloured Lycra jerseys, padded shorts and shaved legs.
  • Some people love them, others think they are overpriced and worn by fashion victims and posers.
Synonyms

Definition of poser in:

There are 2 main definitions of poser in English:

poser2

Line breaks: poser
Pronunciation: /ˈpəʊzə(r)
 
/

noun

A difficult or perplexing question or problem.
More example sentences
  • She throws the question back with the poser, ‘why not?’
  • Something to do with the West Lothian Question, a constitutional poser that once aroused great passion but is now lost in the mists of time.
  • To answer the 300-odd posers on the questionnaire without then being persuaded to sign up for the religion was an essential rite-of-passage for any spotty adolescent struggling to find their own voice.
Synonyms
difficult question, awkward problem, knotty problem, vexed question, tough one, puzzle, mystery, conundrum, puzzler, enigma, riddle
informal dilemma, facer, toughie, tough/hard nut to crack, brain-teaser, stumper, cruncher

Definition of poser in: