He didn't yell at her that this was the stupidest idea he'd ever heard of, the way he wanted.

"No," said Arthur, as if it were the stupidest idea in the world.

Her year at the university proved to be, as she puts it, "the stupidest idea I ever had."

I think they are the stupidest idea ever.

"You know, trying to open that parlor door was about the stupidest idea I ever had."

This is the stupidest idea you've come up with.

"It's another story to keep believing and believing in the stupidest ideas."

Wash says this is the stupidest idea ever, but decides to join them anyway.

He warned earlier this year that military action against Iran was "the stupidest idea I ever heard".

That was the stupidest idea they'd had yet, but perhaps it shouldn't be so easy to blame them for it.