Definition of bum-sucking in English:

bum-sucking

noun

mass nounBritish
vulgar slang
  • 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
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