Mad as a box of frogs
So crazy you think the box of frogs is plotting against you. Like someone who’s lost their mind and their last brain cell.
My uncle is mad as a box of frogs. He thinks the frogs are trying to steal his TV.
The barista was mad as a box of frogs. She tried to make a latte with a frog and a spatula.
My teacher is mad as a box of frogs. She thinks we’re all frogs in disguise.