It refers to when you’re craving something, usually sex, but also things like more Instagram followers, or you want that new Jeep that just drove by. Whatever it is, it's not a beverage. It can also be used in a self-deprecating manner; if you want it so much that you’re thirsty, it might be time to calm down.

See also : KCCO  salty  boil the ocean  on ice  bird boxed  
NetLingo Classification: Online Jargon