Definition of “chat sb up” - English Dictionary

british dictionary

“chat sb up” in British English

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chat sb up

UK informal
phrasal verb with chat uk /tʃæt/ us /tʃæt/ verb [ I ] -tt-

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.

(Definition of “chat sb up” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)