| 1. | a sum of money used for illicit or corrupt political purposes, as for buying influence. |
| 2. | Nautical. a fund from the sale of slush, refuse fat, etc., spent for any small luxuries. |

| slush fund n.
|
Slush Fund
A fund (or something similar) that does not have a designated purpose. These types of funds are often illegal.
Investopedia Commentary
A good example would be a politician siphoning off money for side investments or to help friends.
See also: Mutual Fund