To get moody and sullen over something stupid. Usually followed by spontaneous lecturing on boring topics.
Q: Did the mood in the room just change?
A: Yes, such is the power of Blackening.
by xSiphiliSx March 9, 2009
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A thrash metal masterpiece by Metallica from the album "...And Justice for All". The lyrics are about the consequences of a nuclear war (nuclear winter, thus Blackened.)

It's interesting to note that James Hetfield plays this with downstrokes only... requiring intense stamina to play this and MoP live in the same night.
Metallica opened up with Blackened last night... crazy song!
by sirhc2 April 12, 2007
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A song performed by Metallica, best known for being on the album "...And Justice for All". The drum part to this song is so intense that any mortal man, other than Lars Ulrich himself, who plays this song during a jam session will notice that his or her legs fell off halfway through the song. the guitar part require 3 hands to play
Yoko: What's with the wheelchair and leg injuries?
Douche-fag: What legs? I tried playing "Blackened" by Metallica and my legs fell off.
by Humpcatter16 January 17, 2010
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Opening song on Metallica's 1988 album, "...And Justice For All." Written about destruction of the world by nuclear war, it features an awesome solo by guitarist Kirk Hammett
by dragondance~ February 14, 2007
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The lesser known part of judgement day where everyone goes into a stealing and murdering rampage
Moses: and on the final day there will be the blackening, where all will be killed, raped and lost.
Person: hasn't the blackening spread across Africa then?
Moses: of those we do not speak
by Jewish healthcare November 21, 2016
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what you call a white girl after she has had sex with a black man
hillary has been blacken, leroy fcuk her the other night
by bert January 6, 2005
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The process of white people leaving an urban area for the suburbs leaving a black plurality. The process can only be complete when African-Americans hold the positions of power such as Mayor and police chief.
When Kip Holden was elected mayor the blackenization of Baton Rouge was completed.
by Conrad January 21, 2005
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