try it on with somebody

Từ điển Oxford Advanced Learner 8th

ˌtry it ˈon (with sb) idiom
(BrE, informal, disapproving)
1. to behave badly towards sb or try to get sth from them, even though you know this will make them angry
•Children often try it on with new teachers.
2. to try to start a sexual relationship with sb
Main entry: ↑try_idiom