1) Owen had other fish to fry and for the next two days he was busy on other things.
2) And Landless had just told him on the telephone that he had other fish to fry.
3) I'm not going with you, I have other fish to fry.
4) If you'll excuse me, I have other fish to fry.
5) I'm sorry I can't help you. I have other fish to fry.
6) Sorry, I can't go with you. I have other fish to fry.
7) I haven't time to play with the children; I have other fish to fry.