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suck up to sb

informal disapproving phrasal verb with suck
 
 
/sʌk/ verb

Definition

to try to make someone who is 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."Praising insincerely or too eagerly
(Definition of suck up to sb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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