A person that ruins another persons' hopes, dreams,ideas or good moods by being pessimistic and having a negative attitude.
Girl 1: I told Jay I was going to Hawaii.

Girl 2: What did he say?

Girl 1: That I was wasting my time and money because I would get sun burned right away and be miserable for the rest of trip.

Girl 2: I will make sure to tell that black cloud you said ALOHA!
by jennkas June 18, 2008
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The black clouds is speed or crystal meth. This is because when you do speed something bad happens so its like you have a black cloud over your head.
Dude the black clouds were over my head last night!
by Bobbyrahal April 23, 2008
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When Pollution Takes ova! and THere's Black Clouds and Acid Rain!
WOW Look At Those Black Clouds
by Seagulls Of Satan August 3, 2008
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A Botnet being used as a distributed computational network that very organized hackers, crime rings, or small governments could use to have massive parallel computing power at the ready.

Used to provide the large amount of computing power necessary to crack complex passwords and encryption keys.
"The hacktivist group used their black cloud to crack the organization's network passwords."
by Ar7is7 January 23, 2012
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Dream Theater's 10th studio album. Released on June 22nd 2009.

BCSL is the best album since Scenes from a Memory. The 3 epics on the album are "A Nightmare to Remember", "The Best of Times", and "The Count of Tuscany". "The Shattered Fortress" sums up Mike Portnoy AA suite. "Wither" and "A Rite of Passage" are OK, and they probably the only songs you will ever hear on the radio from this album.
Guy: Did you get Black Clouds and Silver Linings?
Guy2: Yes I did it is amazing. I <3 Dream Theater
by Pethegreat August 1, 2009
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When a black chick squirts in a black guy's asshole and then farts/shits it all out into her mouth then she spits it into a pan and they boil it and smell the black steam then drink it after its boiled then puke in eachothers mouths.
Dude, i gave Kesha-moesha the best black storm cloud ever last night im almost done cleaning off the brown stains on my bed.
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