The act of taking a shit in a toilet already filled with shit because either 
A.) It has become clogged or
B.) You're having a Double Stacking contest
A.) It has become clogged or
B.) You're having a Double Stacking contest
J:  Man, I was at Ray's the other night and had to take a monster shit, but when I got to the bathroom, the only toilet was already full of putrid shit!
DOOKIE: NO! What'd you do man?
J: Well I tried to flush it, but it just spun around a bit. There was no way I was gonna make it home without squirting all over myself.
DOOKIE: Dude, tell me you didn't....
J: Yep, I just Double Stacked it.
DOOKIE: FOUL!
DOOKIE: NO! What'd you do man?
J: Well I tried to flush it, but it just spun around a bit. There was no way I was gonna make it home without squirting all over myself.
DOOKIE: Dude, tell me you didn't....
J: Yep, I just Double Stacked it.
DOOKIE: FOUL!
by The Cheetah Dude August 1, 2005
 Get the Double Stackmug.
Get the Double Stackmug. Fucking Gay, Usually used to compensate for lack of testicular fortitude.
Also see; Cat Rebel, Caballo Diablo, StrokerTurbo7.3
Also see; Cat Rebel, Caballo Diablo, StrokerTurbo7.3
by Imjosh October 7, 2008
 Get the Dual Stacks mug.
Get the Dual Stacks mug. Guy who typically drives a vehicle like an '86 Mercury Cougar, and who usually attracts male suitors.
by Musteadman February 28, 2009
 Get the Pimp Stackmug.
Get the Pimp Stackmug. by juicedmaster April 17, 2014
 Get the stacking nadamug.
Get the stacking nadamug. Is when you shove your penis in a deck of cards and ask your sexual partner, "Pick a card any card." He/She will be tempted to pick your dick and then suck it.
by GaryOak2320 November 3, 2013
 Get the stack in the deckmug.
Get the stack in the deckmug. by My Dude son January 19, 2009
 Get the [stack mode]mug.
Get the [stack mode]mug. A playful "being sociable" game where ya "layeringly" stack up yer hands with those of one or more friends, then ya yank yer "bottom" hand out from da pile and place it on top of da stack of hands, then the next person yanks his hand out from da bottom of da stack and places it on top, and so on.
I love playing circle of friends wif all da pretty girls I meet in da town square, but if we have da use of a picnic table or other elevated flat surface, I also enjoy sharing a round or two of hand-stack wif da cuties afterwards --- nuthin' quite so good at bringing da delighted/amused giggles outta dem.
by QuacksO August 3, 2018
 Get the hand-stackmug.
Get the hand-stackmug.