Definition of quizzer in US English:

quizzer

noun

British
  • 1A person who takes part in a quiz.

    ‘he is an avid quizzer who has won several local events’
    ‘hardcore pub quizzers’
  • 2A person who asks someone questions.

    ‘he managed to impress his daunting quizzers at the final interview’

Pronunciation

quizzer

/ˈkwɪzər//ˈkwizər/