nuttier than a fruitcake

nuttier than a fruitcake

Crazy; idiotic; wacky. Usually used humorously. The kids are always nuttier than fruitcakes when they've had something sugary to eat. My Aunt Jeannie has always been nuttier than a fruitcake.
See also: fruitcake, nutty
References in periodicals archive ?
Anyone who thinks that the world is safer without Saddam is just nuttier than a fruitcake.
He is also nuttier than a fruitcake with enough phobias and obsessions to keep a conference of shrinks going for a month.