throw away on
throw away on (someone or something)
To waste, squander, or misuse something because of or for the benefit of someone or something. A noun or pronoun is used either before or after "away." No wonder you don't have any savings—you keep throwing it away on junk you don't need! I can't believe I threw my youth away on such an unfulfilling job. Don't throw your time and effort away on people who don't appreciate your efforts.
throw something away on someone or something
to waste something on someone or something. I won't throw any more money away on your brother-in-law. I've thrown away too much money on that project.