- Racks is usually referring to a large amount of cash bills being carried by the speaker. It may have evolved as a rhyming of the 'stacks,' which also refers to stacks of cash in the hip hop world.
racks (2)
zero derivation NOUN
Cash or money.
Etymology : zero derivation of racks.
Source : various hip hop songs (2011) - e.g., "racks back on deck you best believe."
Last modified: 2 December 2011