Definition of nooner in English:

nooner

noun

North american
informal
  • An event, especially an act of sexual intercourse, that occurs in the middle of the day.

    • ‘She suspects her husband is having an affair, while he has nooners with his teenage girlfriend.’
    • ‘Sneaking out of work for an exercise ‘nooner’ leaves you refreshed and more creative when you return to your desk.’

Pronunciation:

nooner

/ˈnuːnə/