Being of extremely high
quality. Synonyms include cool, sweet, banging etc.
It is derived from the word money when used in the same way to describe
something of a high standard. Example: Those shoes are money, you are going to get all the ladies.
Bank or Bankass is used when
something is cooler than the word money can convey. This is because money in the bank has already been laundered and is earning interest.
Note:
"Bank" is the shortened version of "Bankass" and has the same meaning.