adjective

Completely mad or demented.

severely mentally ill,mentally ill,insane,mad,certifiable,deranged,demented,of unsound mind,out of one’s mind,not in one’s right mind,not together,crazed,maniac,maniacal,lunatic,unbalanced,unhinged,unstable,disturbed,distracted,stark mad,manic,frenzied,raving,distraught,frantic,hysterical,delirious,mad as a hatter,mad as a March hare