The origin of the idiom "not know beans about something" can be traced back to early 20th-century American slang. "Beans" in this context is used metaphorically to represent knowledge or expertise, with "not knowing beans" indicating a lack of understanding or familiarity with a particular subject or topic. This idiom is typically used to convey a person's ignorance or incompetence in a specific area.

What is the origin of the idiom "not know beans about something" and when to use it?

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to {not} [know] beans about {sth}

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英語での「not know beans about something 」の定義と意味

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