throw good money after bad

Verb

 * 1)  To waste money in a fruitless attempt to recoup losses previously incurred.

Translations

 * Finnish: heittää hyvää rahaa huonon perään
 * German: gutes Geld dem schlechten nachwerfen
 * Norwegian:
 * Bokmål:
 * Polish:, wyrzucić pieniądze w błoto