better things to do
(I've) (got) better things to do.
There are better ways to spend my time.; I cannot waste any more time on this matter. (Either I've got oil have.) Andy: Good-bye. I've got better things to do than stand around here listening to you brag. Henry: Well, good-bye and good riddance. Mary: How did things go at your meeting with the zoning board? Sally: I gave up. Can't fight city hall. Better things to do.