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English definition of “suck up to sb”

suck up to sb

informal disapproving
verb uk phrasal verb with suck   /sʌk/ us  
to try to make someone in authority approve of you by doing and saying things that will please them: "Why do you think he offered to take all that work home?" "Ah, he's just sucking up to the boss."
(Definition of suck up to sb from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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