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yes-man

American  
[yes-man] / ˈyɛsˌmæn /

noun

plural

yes-men

  1. a person who, regardless of actual attitude, always expresses agreement with their supervisor, superior, etc.; sycophant.

yes man British  

noun

  1. a servile, submissive, or acquiescent subordinate, assistant, or associate; sycophant

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of yes-man

First recorded in 1910–15

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.