it's do or die

it's do or die

to try to achieve a goal or fail making the effort It's do or die – if the computer system isn't working by Monday, we'll lose the contract.
See also: die

It's do or die.

something that you say when you are in a situation in which you must take a big risk in order to avoid failure It's now or never - do or die - risk everything or regret it for the rest of your life.
See it's all can do, do the business, do a favour, Do me a favour!, do me a favour, do any favours, do anything by halves, do head in, do homework, Do you mind!, do a mischief, do a number on, do nut, do own thing, do proud, do the rounds, do stuff, do time, do the trick
See also: die