Definition

Large amounts of money, usually represented as piles or bundles of cash; a general term for significant wealth.

Example Usage

He's been saving stacks to invest in real estate.

Origin

From the visual image of stacking money or papers on top of each other.

Fun Fact

Often used interchangeably with 'racks' and 'bands' in hip-hop and street culture, though 'stacks' is more general and less specific to dollar amounts.

Source: Definition backfill (hailey)