Learn English idioms with meanings and examples

🌎Region: International 📊Difficulty Level:intermediate

wrong side of the bed

To be in a bad mood from the start of the day; to be unusually irritable or grumpy.

From the old superstition that getting out of bed on a particular side could bring bad luck; it evolved into a humorous way to explain morning grumpiness.

Often a light, humorous way to explain someone’s irritability (your own or another’s). Can sound mildly accusatory if said to the person directly.

  • He must have gotten out of bed on the wrong side this morning—he snapped at everyone in the meeting.
  • I’m sorry I’m so grumpy today; I guess I woke up on the wrong side of the bed.
  • If she’s acting like that, just give her some space—she probably got up on the wrong side of the bed.
  • Don’t take his comments personally; he’s been on the wrong side of the bed all day.
  • Did you get out of bed on the wrong side or what? You’ve been in a bad mood since breakfast.

Usually used in the pattern “get up on the wrong side of the bed” or “must have gotten up on the wrong side of the bed.” Often with a possessive: “get up on the wrong side of the bed.”

  • be in a bad mood
  • be grumpy
  • be irritable
  • be out of sorts
  • in a good mood
  • bright-eyed and bushy-tailed
  • wake up on the right side of the bed