Пан или пропал!

Throw someone in the deep end (Nata Shkoda)

play an all-or-nothing game; stand or fall; double or nothing (Anglophile); hit or miss (lijbeta); Here goes nothing (NumiTorum); win or bust (Used to indicate that a supreme effort will be made to achieve the stated goal, with utter failure as the only alternative: ‘it's gold medal or bust for both of our basketball teams'

‘tomorrow's game is quite simply win or bust for both teams' Bullfinch)

Hollywood or bust (staking total success or failure on one high-risk event 4uzhoj)

neck or nothing (all or nothing. used as a statement of one's determination and readiness to try and do something despite possible risks, failure, even one's death); man or mouse; win or lose; make or break; make or mar; a feast or a fast; a feast or a famine; kill or cure; sink or swim; make a spoon or spoil a horn