The idiom "slush fund" originated in the mid-19th century and has its roots in the practice of melting snow or ice to create a watery mixture known as "slush." This slush was often used to lubricate or clean machinery. It is often used in political or organizational contexts when referring to hidden or unauthorized funds used for questionable purposes.

What is the origin of the idiom "slush fund" and when to use it?

英語での「slush fund」の定義と意味

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