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English definition of “chat-up line”

chat-up line

noun [C] uk   /ˈtʃæt.ʌpˌlaɪn/ us    /ˈtʃæt̬-/ UK (US come-on line) informal
a remark that someone makes to another person to make their sexual interest known to that person and start a conversation: "Have you been here before?" "That's one of the oldest chat-up lines I've ever heard!"Sexual attractionAttractive
(Definition of chat-up line from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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