Definition of try it on in English:

try it on

phrase

British
informal
  • 1Attempt to deceive or seduce someone.

    ‘you'd better not be trying it on with me’
    • ‘"He's trying it on with me but he's got a 7 months pregnant girlfriend!"’
    • ‘The line manager should not be 'trying it on' with workers - that is sexual harassment.’
    1. 1.1 Deliberately test someone's patience to see how much one can get away with.