Hare Brained 

A person having the intelligence of a rabbit.

An idea or philosophy that a rabbit could have conjured up

George W. Bush was the most hare brained President we ever had

Who ever came up with the hare brained idea of a burial vault?

Hare Brained by Stefonamus April 2, 2010

Hare-brained 

Adj irresponsible and idiotic combined

If you have hare-brained ideas, or want to be employed as a buffoonishly idiotic clown, don't plan a ninja counter-strike, ever.

Hare-brained by Uncle Dimma January 14, 2022