Top definition
I drank too much tonight, I just yacked behind his shed
by Vick March 06, 2005
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2
Abbreviation of Cognac - i.e. expensive Brandy. Alcoholic beverage
by Mutspelski February 15, 2005
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3
verb. Meaning to throw up or vomit.
I am going to yack on your sweater.
by ToplessFlamingo January 21, 2007
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4
A word used exclusevly in the Edinburgh area (Scotland) meaning eyes.
"She hates it when I jizz in her yacks"

"it hit me right in the yack"
by Dr. Poppenstein September 04, 2007
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5
in referance the Lil Jon & The East Side Boyz song "Da Blow" where the hook states "the blow, the pills, the yack, the herb". The term "yack" is actually referring to cognac (pronounced: "cone-yack"). So in essence the song is referring to the blow (cocaine), the pills (ecstacy and/or pharmacutical), the yack (cognac), the herb (marijuana). Which covers all the most common methods of getting fucked up.
In less urban environments, the term is more commonly used to describe the act of vomiting.
noun: yack means congac
verb: yack means to vomit
Da blow, da pills, da yack, da herb... (repeat)
or
I drank too much, I think I'm gonna yack.
by hunnygrl420 July 25, 2009
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6
cocaine, blow, powder, snow, gack
by BiGFiSH May 30, 2006
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7
to talk continuously, especially informally
All that Edward does is talk yack.

Edward: it's kinda like the idea of dog years
you know like a dog is 5, but it's actually like 30 in dog years
there should be some kind of conversion for girls to guys cause you know, girls kind of peak early
so like a 26 year old guy is like an 18 year of girl
Me: SHUT THE YACK UP!

Less yack, more work.
by #.1 August 16, 2010
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