throw good money after bad
US /θroʊ ɡʊd ˈmʌn.i ˈæf.tər bæd/
UK /θroʊ ɡʊd ˈmʌn.i ˈæf.tər bæd/

1.
jogar dinheiro bom fora, desperdiçar dinheiro
to waste money by spending more on something that has already been unsuccessful
:
•
Investing more in that failing business would be like throwing good money after bad.
Investir mais naquele negócio falido seria como jogar dinheiro bom fora.
•
She realized she was just throwing good money after bad trying to fix the old car.
Ela percebeu que estava apenas jogando dinheiro bom fora tentando consertar o carro velho.