I declare shenanagins - A shout you make when you're super annoyed that someone did

A shout you make when you're super annoyed that someone did something shady. You say it in front of everyone so they feel even worse.

I declare shenanagins! You texted my crush and said I had a pig for a pet!

I declare shenanagins! You took my snacks and left me with a chicken!

I declare shenanagins! You said I was the worst student in the class!