The idiom "one's head out" likely originated from the idea that someone is speaking or expressing themselves so vigorously that it appears as though their head might detach from their body. It is used to emphasize the intensity or volume of someone's voice or expression, whether due to enthusiasm, excitement, anger, or other emotions. It often describes actions that are striking or memorable due to their passionate delivery.

What is the origin of the idiom "one's head out" and when to use it?

英語での「one's heart out」の定義と意味

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