v. phr. To do as you please without caring what will happen to other people; act so carelessly or unfairly that people cannot depend on you; be very unreliable. He played fast and loose with the girl's affections. He played fast and loose with the company's good name.
PLAY FAST AND LOOSE
Meaning of PLAY FAST AND LOOSE in English
American idioms English vocabulary. Английский словарь американских идиом. 2012