waste on (someone or something)
To expend something on a person or thing that will not appreciate or properly utilize it. A noun or pronoun can be used between "waste" and "on." Her talent in art is wasted on me—I have no eye for design.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
waste something on someone or something
to throw something away on someone or something. Please don't waste any sweet potatoes on me. I don't like them. I can't waste any more money on this car.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.