wake up on the wrong side of (the) bed(redirected from waking up on the wrong side of the bed)
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wake up on the wrong side of (the) bed
To be in a particularly and persistently irritable, unhappy, or grouchy mood or state, especially when it is not in line with one's normal disposition. I'm sorry I snapped at you earlier, I think I just woke up on the wrong side of the bed today. Jeez, the boss has been in a really bad mood all day. I guess he must have woken up on the wrong side of bed!