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8.
An even large amount of bills in the form of cash stacked up on top of eachother, usually held together with a rubberband or a paper band straight from the bank. Its not a stack if its folded.
Most people go by 100's

100 hundred dollar bills $10,000
100 fifty dollar bills $5,000
100 twenty dollar bills $2,000
100 one dollar bills $100

Or you could go by 50's or 10's

50 hundred dollar bills $5,000
50 fifty dollar bills $2,500
50 twenty dollar bills $1,000
50 one dollar bills $50

10 hundred dollar bills $1,000
10 fifty dollar bills $500
10 twenty dollar bills $200
10 one dollar bills $10

All of these can be excepted as a Stack. It just depends on how wealthy you are.
"Aye, Im rollin in the checks, I got stacks on the deck."
-me

"We be stackin this paper up"

"Last night i hit the strip club with a stack and made it fucking rain."
by JakeSAUCE November 18, 2007
 
1.
one stack = 1 G
by Anonymous July 14, 2003
 
2.
$1,000/ A Thousand Dollars
Yo, I only gotta stack to play wit for the weekend.
by Brath November 06, 2004
 
3.
Thousands of dollars. A stack is one thousand dollars. Stacks is a synonym for thousands referring in terms of dollars.
5 stacks is 5 thousand dollars.
by StaxxMoney December 07, 2013
 
4.
1,000 dollars
My dubs ran me two stacks!
by pleth June 07, 2003
 
5.
To be able to apply more than once, or combine with something else that has the same effect. Comes from video games and pen-and-paper RPGs.
The flyer says "30% off all jeans". Does that stack with the student discount?
by Seahen June 26, 2011
 
6.
Noun

\ˈstaks\

An elaborate hairstyle resulting in multiple layers and textures. Typically rendered by utilizing several styling techniques including weave extensions and braiding.
"And this bitch got like 12 stacks in her head, old school bitch. She got like stacks on the left, stacks on the right"

Artist: Mannie Fresh
Album: The Mind of Mannie Fresh
Song: Pussy Power
by J.A. Johnson September 29, 2011
 
7.
A section of the library that is rarely used, such as the history section, that is an ideal location for sex.
My boyfriend and I went to the library to study for our history exam but we had sex in the stacks instead
by angela scott February 12, 2009