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?
by Stefonamus April 02, 2010
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If you have hare-brained ideas, or want to be employed as a buffoonishly idiotic clown, don't plan a ninja counter-strike, ever.
by Sexydimma January 14, 2022
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