Meaning of bum-sucking in English:

bum-sucking

noun

mass nounvulgar slang British
  • The use of flattery or other obsequious behaviour in order to gain favour.

    obsequiousness, sycophancy, excessive deference, subservience, submissiveness, fawning, toadyism, toadying, grovelling, cringing, unctuousness, oiliness, abjectness, abjection, cravenness, slavishness, humility, self-abasement