stuffed shirt

stuffed shirt idiom
An overly formal or pompous person, as in She's such a stuffed shirt that I'm surprised you'd invite her to a barbecue. This expression alludes to a shirt filled with paper (instead of a real person). [c. 1900]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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