When someone is smoking "purple" marijuana, they're said to be blowing out "purple smoke" aka "purple clouds".

Purple marijuana is considered to be of a very high quality.
Drake: "Blowing Purple Clouds Nigga I'm so sky high"
by dgad87 March 10, 2012
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The smoke produced when you smoke any strain of marijuana that is of a purple color.
Steve: hey Julio, I hot some grand daddy purple. wanna smoke it with me?
Julio: hells yeah man, Imma blow some purple clouds with this shit.
by Fascinated Spirit May 9, 2013
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The best RuneScape private server leader to ever grace the scene. Often described as "The Chemist" due to his immeasurable IQ and talent of hybridding. His indomitable reign lasted seven cycles of the Earth circling the circumference of the Sun (2010-2017). Forever we will always remember Purple Cloud the Great Conqueror of Gielinor.
Is that Purple Cloud from Chaotic Impulse? Run now or we're all dead.
by Profash February 7, 2019
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When a fart lingers in the room way to long and the next person walks through it when no one is around.
Joe: Damn someone floated and air bisquet and now I’m engulfed in a purple cloud.
by Keysmarine June 10, 2018
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