yes man

This term carries a strong negative connotation, implying a lack of integrity, courage, or critical thinking. It describes a sycophantic relationship where the individual prioritizes professional survival or personal gain over honesty and truth. Because it suggests a subservient personality, using it to describe someone is typically an insult or a sharp critique of their character.

In professional environments, a yes man is contrasted with a "devil's advocate" or a trusted advisor. While a trusted advisor provides honest feedback to improve a project, a yes man provides empty validation that can lead to organizational failure by shielding leaders from necessary corrections.