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English definition of “perk (sb) up”

perk (sb) up

phrasal verb with perk     /pɜːk/ US  /pɝːk/ verb [I or T] informal
to become or cause someone to become happier , more energetic , or more active : She perked up as soon as I mentioned that Charles was coming to dinner . He perked up at the news . Would you like a cup of coffee ? It might perk you up a bit .Taking pleasure in something
(Definition of perk (sb) up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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