I declare shenanagins - When you're so fed up with someone's trickery that you yell

When you're so fed up with someone's trickery that you yell it out like a battle cry. You hope they feel really bad and maybe even get in trouble.

I declare shenanagins! You took my snack and gave me a sandwich made of sand!

I declare shenanagins! You told my crush I was a total mess!

I declare shenanagins! You said I was the worst at science!