Like a bear with a sore head意思

"Like a bear with a sore head" is an English idiom that means someone is irritable, grumpy, or in a bad mood, often due to pain or discomfort. The phrase suggests that the person is as unpredictable and potentially dangerous as a bear that is suffering from pain or has been injured.

This idiom is used to describe someone's behavior or demeanor when they are not acting normally due to some sort of discomfort or issue. It's a colorful way to say that someone is not to be trifled with or approached lightly because they are in a particularly bad or sensitive mood.