Curse your bones

Cursing your/ somebody's bones are the opposite of blessing ones bones. It's a way to express how mad you are at someone.

Ant : I ate your chocolate.

Alison : curse your bones!

Bless Your Bones

Bless your bones is a phrase where you want to bless someone right down to the core of your bones.

Daisy : "I feel really sick!"
Charlotte: "Aw, bless your bones."