off day

/ɔfˈdeɪ/
noun
  1. A day when someone performs poorly or is not at their best.
    • Even the best chefs have an off-day when nothing seems to go right in the kitchen.
    • The tennis star admitted she had an off-day and made too many unforced errors.
    • I'm having an off-day at work; I can't concentrate on anything.
  2. A day when someone is not working; a day off.
    • Friday is my off-day, so I usually sleep in and run errands.
    • He requested an off-day next Tuesday to attend his daughter's school play.
    • She spent her off-day hiking in the mountains with friends.
Antonyms
What does "off day" mean? | whatsthatwordmean | whatsthatwordmean