She's as nutty as squirrel poo.
What is Thanksgiving without a nutty relative?
One correspondent, who is into psychology, notes that in his experience people who are hoplophobes are nearly always nutty in other ways, too. Hoplophobia [fear of guns], of course, is not simply an attitude but rather an aberration in which the sufferer clings to an idea which he himself knows to be unsound, such as the idea that inanimate instruments have a will of their own or that lawbreakers abide by the law.
that's as nutty as squirrel turds
I am radically, insanely, nutty in love with Jesus!
I don't know what our capabilities are. If I were there, I think it would be nutty to do that. The only country on Earth more containable than Iran is Iraq. And we've certainly made a mistake there. We could have continued Saddam.