the.com/yes man

means A person who automatically agrees with whatever a superior or powerful person says, out of flattery or fear rather than genuine conviction.

from An American coinage from the early 20th century, often traced to Hollywood studio culture — the term reportedly described the underlings surrounding powerful movie executives who nodded along with every decision, however bad, to keep their jobs. It was popularized in print and cartoons by the 1920s-1930s as business and office slang before spreading into general use for any sycophantic subordinate.