I’ve got better fish to fry

This one comes from the Christopher Walken character in the movie Batman Returns:

Charles ‘Chip’ Shreck: Dad, you buy that “blurry” business?
Maximillian’Max’ Shreck: Women. Nothing surprises me, Chip, except your late
mother. Who’d have thought Selina had a brain to damage. Bottom line,
she tries to blackmail me, I’ll drop her out a higher window. Meantime, I
got better fish to fry.

This is a blend of “I’ve got bigger fish to fy” and “I’ve got better things to do”.  Kudos to Barry Eigen for spotting this subtle malaphor.

Cover of "Batman Returns (Two-Disc Specia...

Cover via Amazon