Definition of ass-kissing in English:

ass-kissing

(also ass-licking)

Pronunciation /ˈasˌkisiNG/ /ˈæsˌkɪsɪŋ/

noun

vulgar slang North American
  • The use of flattery or other obsequious behavior in order to gain favor.

    • ‘a master of ass-kissing and flattery’
    obsequiousness, sycophancy, excessive deference, subservience, submissiveness, fawning, toadyism, toadying, grovelling, cringing, unctuousness, oiliness, abjectness, abjection, cravenness, slavishness, humility, self-abasement

adjective

vulgar slang North American
  • Using flattery or other obsequious behavior in order to gain favor.

    • ‘a bunch of ass-kissing sycophants’