The idiom "a mug's game" has its origins in British slang, where "mug" is a term for a gullible or easily deceived person. "A mug's game" is used to describe an activity or endeavor that is considered foolish, unwise, or a waste of time, often due to the high likelihood of losing, being deceived, or experiencing unfavorable outcomes. It implies that engaging in such an activity is not a wise decision.

英語での「a mug's game」の定義と意味

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