#easypeasy_idioms
I cannot help you with that, I
have other fish to fry.
to have other/bigger fish to fry (informal) - to have other things to do, especially more important things (мати інші, важливіші справи)
e.g. I can't deal with this now - I'
ve got other fish to fry. - Я не можу зараз з цим розбиратися, у мене є інші справи.