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1.
This russian word is one of the universe's greatest mysterious, including:
What happend to the unknown wonders of the worlds?
What is the true nature of god?
Why god created animals out of meat if he did not want us to feast of them?
etc. so does blyat comes along. The formal known version of this particular word is translated to simply- "whore" "slut" and other words that explain the oldest proffesion in this world. Yet, russians (and latley, Israelis as one, even without a slavic roots in blood) are using this term as a link-word, as a curse, almost anything you can imagine.
"blyat, I messed up!"
"you damn bitch, blyat!"
"I hate you, blyat, and I need something!"
"...blyat. blyat?
-blyat."
by Spiel Brickner September 06, 2005
 
2.
In continue to the definition by Spiel Brickner, which was rather accurate, I'd like to add a couple of things.
While using the word "blyat" as a link word (regardless to its meaning) , there are no rules for where to place this word in the sentence. You may place it anywhere in the sentence as many times as possible, even after each word if you will, and it will still remain correct russian grammar.
The bets anology demonstrating it, is the hebrew word "keilu", which northern Israeli bitches use similary as a link word placing it randomly in the sentence regardless the meaning of the word itself.
(A little exaggerated example, even though you can find russian people talking this way)
Yesterday blyat I went to this party, blyat, and it was so lame blyat that even after I got drunk blyat I didn't feel like dancing blyat.
by Alon Gutman July 16, 2006
 
3.
a way to communicate without the hassle of thinking and saying the numerous words that it takes to get your meaning across. but be aware the person you're communicating to has to be on the same wavelength as you and/or have a significantly high/low i.q. otherwise it'll all just be gibberish which it is basically. i don't know why i ever learnt it, it's just a waste of time and kills your brain cells, but you're reading this too which means you also know it, ain't life a bitch?
a way to blyat without blyatting, but the blyatter you're blyatting to has to be blyatting the same blyat or be a good enough blyatter to blyat your blyat otherwise it'll just be BLYAAT. i don't know why i blyat, but you're blyatting too or trying to, haha you got BLYAATED!
by Oh Blyat February 28, 2007