slush fund

Etymology
Originally in reference to money for miscellaneous uses that sailors made by selling.

Noun

 * 1)  Money stored for illegal or dishonest purposes.
 * 2)  Money that has not been hypothecated or dedicated to a particular purpose, or which is used for a different purpose than originally intended.
 * 1)  Money that has not been hypothecated or dedicated to a particular purpose, or which is used for a different purpose than originally intended.
 * 1)  Money that has not been hypothecated or dedicated to a particular purpose, or which is used for a different purpose than originally intended.
 * 1)  Money that has not been hypothecated or dedicated to a particular purpose, or which is used for a different purpose than originally intended.

Translations

 * Finnish: pimeä rahasto, lahjusrahasto
 * French:
 * German: Schmiergeldfonds, schwarze Kasse
 * Greek: μαύρο ταμείο
 * Italian: fondi neri
 * Japanese: 裏金
 * Korean:
 * Portuguese: caixa dois, saco azul