chat up Informal
Meaning: to talk to someone in the hope of beginning a romantic relationship with themSynonym: hit on (informal), flirt with
- chat up sb Juan is very good at chatting up girls. He knows how to make them laugh.
- chat sb up Mark finds it difficult to chat guys up because he often feels shy, and he doesn't know what to say.
Hiroko is chatting the girl up because he wants to