as if (one's) life depends on it(redirected from as if his life depended on it)
as if (one's) life depends on it
With maximum, possibly desperate, effort or energy (i.e., as if one is at risk of losing one's life if one fails). The boxer started the third round throwing punches as if his life depended on it. This project could very well determine the future of the company, so start working as if your lives depend on it!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.