Definition & Meaning of "bootlicker"in English

What is the origin of the term "bootlicker" and how is it used?

"Bootlicker" is an English slang term that dates back to at least the 17th century, originally describing someone who literally licked another person's boots as a symbol of extreme subservience. Over time, it became a figurative insult for anyone who is servile, overly obedient, or eager to flatter authority figures to gain favor. The term is used in informal, political, and social contexts to criticize sycophantic behavior. It is clearly derogatory and carries strong contempt, though it is not vulgar—it targets behavior rather than character in a coarse way.