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This phrase is used as a substitute for "ah fuck it", and really is just a creative use of the word "blah".

Specifically, it should be used when something doesn't need to be said and you realize it when you're halfway through explaining it or even in mid-sentence.

It could also be used when you suddenly change your mind about something.
I've got 15 minutes to get to this wedding and I can't find my tie!!
Blah fuck it, I'll go without one.
by quetzaln October 31, 2010
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Apr 25 Word of the Day
v. collectively or individually finding someone/something to blame for a problem, as opposed to brainstorming which connotes finding solutions to a problem

n. the act of finding someone/something to blame for a problem

(from a TV ad for HD television)
The committee commenced blamestorming over the situation rather than seeking solutions to the problem.
by TBea April 22, 2008
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