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The release of noxious fumes or toxins from dead and/or decaying plants or animals. Usually causes abnormal things to happen.
The overbearing amount of deaths must be caused by that plants "miasma"
by HomocideFactor101 March 27, 2005
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A thick vaporous atmosphere or emanation, or poisonous air
As the satanic cannibals fed on the rotted baby carcass the psychedelic mushrooms began to intoxicate my mind--I splatter-vomited putrid blood scabs on my own legs, which surmounted into a nightmarish MIASMA {poisonous atmosphere!!!
by Bobby Revell March 08, 2007
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The corrupted gas that kills you in Crystal Chronicles.
Clavat: Dude, grab the chalice. I'll go ahead, so back me up.
Yuke: You grab it, I don't want to.
Clavat: *Runs ahead; chokes to death on miasma*
by AlphaGlobin May 13, 2008
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Attack similar to a Pestilence, but doesn't linger as long.
The Miasma erupted on the Utukku, striking dangerously at its face.
by Kwing October 28, 2009
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Black Dahlia Murder Fan: Dude did you hear that song Miasma?

Other Black Dahlia Murder Fan: Hell yeah it's sick man!
by Bdman13 October 22, 2009
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