A person who flaters in a servile way?

A person who flatters in a servile way is often referred to as a sycophant. This individual excessively praises or ingratiates themselves with others, typically to gain favor or advantage, often at the expense of their own integrity. Their behavior is characterized by insincerity and a lack of genuine respect, as they prioritize personal benefit over honest relationships. Such flattery can be seen as manipulative and is often viewed negatively by others.