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English definition of “chat sb up”

chat sb up

UK informal
verb [I] uk phrasal verb with chat   /tʃæt/ (-tt-) us  
B2 to talk to someone in a way that shows that you are sexually attracted to them: He spent all evening chatting her up and buying her drinks.Sexual attractionAttractive
(Definition of chat sb up from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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