Verb
piss away (third-person singular simple present pisses away, present participle pissing away, simple past and past participle pissed away)
(idiomatic, transitive, vulgar, slang) To spend wastefully.
I pissed away four years of my life in university and didn't graduate.
The old mayor pissed millions of dollars away on stuff nobody wanted.
You can't keep pissing away your money like this!