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piss (something) away
To waste something, especially in a very careless or foolish manner. I can't believe you pissed away our life savings at the racecourse. I had a lot of strings to get you a meeting with the CEO, so don't piss this opportunity away!
Squander, waste, as in They've pissed away a fortune on those horses. This term uses piss in the sense of "discharge something as though it were urine." [ Vulgar slang; first half of 1900s]
v. Vulgar Slang
To waste or squander something.