abnormal absurd apish asinine batty bedlamite befooled beguiled bereft of reason besotted boneheaded brainless brainsick buffoonish cockamamie cockeyed crackbrained cracked crazed crazy crazy about credulous cretinous daffy dazed deluded demented deprived of reason deranged dim-witted disoriented distraught dizzy dopey doting dumb fat-witted fatuitous fatuous flaky flighty fond fool foolheaded foolish fuddled futile gaga giddy goofy gulled hallucinated idiotic imbecile imbecilic inane inept infatuated infatuated with insane irrational kooky loco loony lunatic mad mad about maddened manic maudlin mazed mental mentally deficient meshuggah moon-struck moronic non compos non compos mentis nonsensical not all there not right nuts about nutty obtuse odd of unsound mind off psycho queer reasonless ridiculous sappy screwy senseless sentimental sick silly slow-witted stark-mad stark-staring mad strange stupid sweet on tetched thoughtless touched unbalanced unhinged unsane unsettled unsound wacky wandering weak-minded wet witless