Learn English – Why does “big cheese” mean someone important

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This is one of those common phrases that I have never really questioned until now.

According to the free dictionary, "Big cheese" means an "important person".

But what on earth does "cheese" have to do with being important? Where did this phrase come from?

Best Answer

It appears to be from Persian and Urdu.

https://en.oxforddictionaries.com/definition/cheese#cheese_Noun_200

noun
(in phrase big cheese) informal

an important person:
he was a really big cheese in the business world

Origin:

1920s: probably via Urdu from Persian čīz 'thing': the phrase the cheese was used earlier to mean 'first-rate' (i.e. the thing)

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