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off one's rocker
01
in a state affected with madness or insanity
What is the origin of the idiom "off one's rocker" and when to use it?
The origin of the idiom "off one's rocker" is not entirely clear, but it likely comes from the idea of a rocking chair. When someone is "off their rocker," it means they have lost their balance or stability, much like a rocking chair that is no longer balanced and wobbles unpredictably. It is used to describe someone who is behaving in a crazy, irrational, or mentally unstable manner.
例
He has been acting off his rocker ever since the accident.
The politician is making outrageous claims, and people think he's off his rocker.
Yesterday, she was completely off her rocker, yelling at random strangers on the street.
