Receiving money for the purpose of saving it for an indefinite period of time. A catchier derivative of money in the bank. Also pertains to the use of the word bank to mean money itself, rather than a place money. "Tank," in this case, refers to one's wallet, an actual bank
, or any other place where money is kept. "Bank in the tank," like money in the bank
, can also refer to reliability of an event. Often associated with ghetto terminology.