I don't give a ruff - A messy, loud way to say you're not paying attention and are

A messy, loud way to say you're not paying attention and are probably eating something.

I don't give a ruff you're talking to me. I'm still eating my pizza.

I don't give a ruff you're yelling. I'm still watching my show.

I don't give a ruff you're making a mess. I'm still eating my snack.