overly eager to praise or obey
obsequious - submissive
An 'obsequious' person is considered to be overly obedient or submissive. They like to ingratiate themselves with people in authority or those they believe are more important than them, but do not do so through hard work and ability. Instead, they resort to flattery and extreme agreeableness.
The salesperson had an obsequious manner that was extremely off-putting. He was just so obviously disingenuous.
Mary is an obsequious student who is always trying to win favour with her teacher.
David’s obsequiousness means that his boss takes advantage of him and his co-workers do not respect him.