Crazy, insane.
A device used to store hats upon, consisting of a vertical pole with a sturdy base to prevent toppling, and an array of pegs to hold the hats.
Causing insanity or madness.
Used by or relating to insane people.
Extremely good; incredibly amazing.
Characterized by insanity or the utmost folly; ridiculous; impractical.
Exhibiting unsoundness or disorder of mind; not sane; utterly mad.