Definition of bum-sucking in English:

bum-sucking

noun

British
vulgar slang
  • [mass noun] Obsequious, servile behaviour.

    sycophantic, ingratiating, obsequious, fawning, servile, self-abasing, grovelling, subservient, wheedling, cajoling, crawling, cringing, uriah heepish, humble, toadying, hypocritical, insincere, flattering, adulatory, honey-tongued, silver-tongued, gushing, effusive, suave, urbane, glib, smooth, smooth-tongued, smooth-spoken, smooth-talking, slick, slippery, saccharine
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