buttoned-up

[ buht-nd-uhp ]
/ ˈbʌt ndˈʌp /
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adjective

carefully planned, operated, supervised, etc.: one of the most buttoned-up companies in the business.
conservative, as in professional style or manner: Employers are looking for buttoned-up types.

Origin of buttoned-up

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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