risky move

Translations
рискованный шаг
He made a risky move by quitting his job without another one lined up.
Он сделал рискованный шаг, уволившись с работы, не имея другой на примете.
Definitions
A risky move refers to an action or decision that involves a significant level of uncertainty or potential for loss, often with the possibility of achieving a substantial reward or benefit.