One who is so drunk they cannot stop throwing up for an entire night. They are the entertainment for the other party goers and generally don't remember the night's events. They usually also throw up in a location other than the toilet, such as a bed, a car, on themselves, or on someone else.
'John you were such a yack show last night!'
by :):):):) August 29, 2007
5 Words related to yack show

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