The act of multiple people taking a dump in the same toilet, one after the other, without flushing in the hopes of achieving ultimate cloggage.
Wanna do some stacking in the 3rd floor stall? Last time the janitor had to clean it out with a garden trowel.
by brs677 December 3, 2010
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The stacks is where college students go for a steamy sexy study break, usually during midterms and finals.
Steven: you at the library?

Katie: ya you?

Steven: meet me at the stacks

Katie: be there in 5!
by Jackrabbit88 January 17, 2014
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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
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Originally "100 bills", bound in a paper ribbon.

Among black people and proles of America it's synonymous with a grand, in any combination of bills.
Tool: "I hope you brought some cash."
Poser: "I got a stack on deck, bitch!"
Tool: "A stack of?"
Poser: "A grand, fool!"
Tool: "You brought a stack of monopoly money? We got a high roller here."

Contrary to popular belief, it's legal to carry a stack of 100s around without declaring it to the Treasury.* Just be white or famous.
by reallynotreal February 6, 2015
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the act of gently taking your lover by the hand,

leading her to the bathroom,
you both strip your clothes off,
the male sits on the pot.
with his legs spread.

roughly place your lover's legs on you,
so that she is sitting on your lap.

depending on your level of intimacy,
you can be facing each other,

or turned away.

most english speaking countries prefer the turned away position.

the male starts by expulsion and voids a salvo into the glistening white porcelain bowl.

this is the female's cue to do likewise.
she drops the kids off at the pool between the male's legs,
while he is spraying some mud.

this the highest form of togetherness and spiritual communion.

(note : it is considered a technical foul to splash on your partner's legs.
so aim your anus with accuracy.)

wiping each other requires much dexterity.
(note 2 : for the ultimate in intimacy, you can each have a hand on the flusher in the spirit of loving cooperation.
some consider simultaneous pooping and flushing to be the apex or zenith of Stacking.)
"I really feel closer to Johnny after our first stacking session;
it was sublime!"

"Don't stack with Roberto, his hairy legs really itch."

"I thought Veronica would be really good at stacking, instead she splashed me ! Fucking Amateur ! "
by Turdly Bugglestein October 3, 2011
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The act of 'stacking' several steroids together during a cycle.
I've stacked Dianabol and Deca Durabolin and will likely see gains upwards of 20lbs or more in 8 weeks.
by Diesel_Smoke January 18, 2005
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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 27, 2011
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