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English definition of “Mister Big”

Mister Big

noun [S]     humorous
the most important person in a place or organization : Paul is Mister Big in our department , so it's important to make a good impression on him.Important people and describing important peopleFamous peopleWealthy people
(Definition of Mister Big noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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relating to behaviour between people that is pleasant and friendly, often despite a difficult situation

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