Longman Dictionary of Contemporary English
sweated labour
noun
EXAMPLES FROM CORPUS
▪ As a matter of fact, most of the London publishers send their printing to Edinburgh to get it done at half cost by sweated labour.
▪ Daily it devours whole forests and countless hours of sweated labour.
Usage examples of "sweated labour".
Giving the impression that the Cold War is over and they really want to be friends, taking over wherever we stop paying out, industrial sabotage and using sweated labour to undersell us.
She instructed her man of business to sell all her shares in that Inferno of sweated labour and for the next forty years, as she always put it, attempted to make restitution.
Once, when I hinted to Urky that it was sweated labour, he looked hurt, and said he had supposed I got as much fun out of it as he did!