get out of bed on the wrong side

Related to get out of bed on the wrong side: get up on the wrong side of the bed, get the hang of

get out of bed on the wrong side

To be in a particularly and persistently irritable, unhappy, or grouchy mood or state, especially when it is inconsistent with one's normal disposition. I'm sorry I snapped at you earlier, I think I just got out of bed on the wrong side today. Geez, the boss has been in a really bad mood all day. I guess he must have gotten out of bed on the wrong side!
See also: bed, get, of, on, out, side, wrong
Farlex Dictionary of Idioms.

get out of bed the wrong side

or

get out of bed on the wrong side

If someone got out of bed the wrong side, they are in a bad mood all day and there is no obvious reason for it. Sorry I was so grumpy when I arrived this morning. I must have got out of bed the wrong side. Note: This relates to the old superstition that it was unlucky to put your left foot on the ground first when getting out of bed. `Get off on the wrong foot' is based on a similar belief.
See also: bed, get, of, out, side, wrong
Collins COBUILD Idioms Dictionary, 3rd ed.

get out of bed on the wrong side

be bad-tempered all day long.
See also: bed, get, of, on, out, side, wrong
Farlex Partner Idioms Dictionary

get out of bed on the wrong side

(British English) (American English get up on the wrong side of the bed) be bad-tempered from the moment when you get up: Why is Pete so irritable this morning? Did he get out of bed on the wrong side again?
See also: bed, get, of, on, out, side, wrong
Farlex Partner Idioms Dictionary
See also:
  • get out of bed the wrong side
  • wake up on the wrong side of (the) bed
  • get up on the wrong side of (the) bed
  • get up on the wrong side of bed
  • got up on the wrong side of bed
  • get out of the wrong side of (the) bed
  • out of humor
  • out of humour
  • out of sorts
  • feel out of sorts