If you throw up Jack Daniels in a Spanish speaking country. In English you would Yack Jack, however Spanish people pronounce words starting with J as Y, hens Yack Yack.
(Dude throwing up Jack Daniels in Cancun when a local is around and sees)
Dudes Friend: Where did my buddy go?
Mexican Local: Oh, he Yack Yack Senior.
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to throw up, usually after drinking
I drank too much tonight, I just yacked behind his shed
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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.
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verb. Meaning to throw up or vomit.
I am going to yack on your sweater.
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Abbreviation of Cognac - i.e. expensive Brandy. Alcoholic beverage
me and my brothers sipping yack
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to throw up due to intoxication.
last night krumples spent the night by the toliet. that's why we call her Mrs. Yack-Yack
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