"if you cannot do the work you will have to leave; shape up or ship out" "When I complained about long days, the foreman said, ""If you can't cut it, you can't stay."""
IF YOU CAN'T CUT IT, YOU CAN'T STAY
Meaning of IF YOU CAN'T CUT IT, YOU CAN'T STAY in English
English idioms vocab. Словарь английских идиом и выражений. 2012