Top definition
The name of a failed "smart cup" kickstarter in which the cup would tell you what you were drinking, as if you didn't know already. A colossal waste of money.
Moron: "I just ordered this smart cup called the vessyl. It tells me what I'm drinking. IT EVEN DOES SMOOTHIES!"
Everyone: "That sounds like a terrible product"
Moron: "JACS"
by Advanced Furby May 24, 2017
Happy St. Patties Day!
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