Originates from casino the gambling term "STACKS ON RACKS." Plastic "racks" hold "stacks" of 100 casino chips each. Since casino chips are uniform in size, a rack can hold $100 (if $1 chips) up to $500,000 (if $5,000.00 Chips). The "racks" themselves are also stackable. So RACKS ON RACKS describes the stacking of plastic chip racks....each holding stacks of up to 100 casino chips of any denomination as described. AKA a shitload of money.
I was on a heater and took racks on racks from that blackjack table.
by Frazynut August 4, 2018
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Comparing how much money you have financially, compared to another individual. Most common amongst men towards other men. A rack is the equivalent of one band, also known as $1,000. The more racks you have, the more "manly" you are compared to another man. It is comparing yourself financially to another man trying to punk you, most of the time that other man is a broke *****. Stay woke
"Let's go Bar for Bar since you wanna talk so much ****

Rack - "1 thousand dollars"
Bar for Bar/Rack for rack - "The challenge of comparing itself"
by justanotherdudeinthisworld521 September 14, 2023
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1. When you either have an epiphany or realize something
2. If someone says something you agree with or think is smart
"We should go to Walmart tomorrow."
"Oh rack rack we should."
by the genius toenail October 5, 2023
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A rack is (1) thousand cash could be within a rubber band. RACK & STACK are commonly confused in urban slang. 10 racks equals a stack. 100 racks equals one(1) book. 1000 racks equals one(1) bible. Also see stack bible book
Jen: How much money do you have to spend at the club?

Tom: 8 racks

Note: Technically equals = $8,000
by joey jaw breakers FLA February 2, 2017
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1. (n) set of breasts (particularly round and large)
2. (n) stacks of money placed in hundreds that adds up to be more than a thousand dollars
3. (V) to get 150+ likes on a photo on some social media
1. "ma'am, in the leopard dress, you have an amazing rack!" (usually followed by a slap but in this case, a cry from a lost baby in the back seat of a stolen cop car.)
2. "Stealing that rack is a felony in NYC, jackass!"
3. "Dammnnn, since when did that bitch rack on Instagram!"
by d-to-the-ray June 23, 2014
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Boobs on top of boobs. Usually occurs when two busty girls hug.
Double D chicks huggin', I got racks on racks
by dawa April 21, 2012
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