flatterer
🇺🇸
/ˈflætərər/
🇬🇧
/ˈflætərə(r)/
A person who says nice things about someone, often insincere, to gain favor or approval.
The new employee was a flatterer, always complimenting the boss to get ahead.
新しい従業員はお世辞屋で、常に上司を褒めて出世しようとしていた。