a pill of ecstacy that is supposed to have 4 times the potencey of a regular pill, hence quad.
i got geeked outta this world on a single quad stack last night.
by sundvlsroll January 16, 2009
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A Burger King creation which can kill you with a single bite.
Dude 1: Hmm. I want a hamburger consisting of four low quality hamburger patties, sandwiched with 8 strips of bacon, with a slice of good ol' american cheese in between each patty.
Dude 1: I also want to die.. But take a huge shit before I die..
Dude 2: Then you would want the 'quad stack'..
by Kenny12345 June 22, 2007
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