sociopathic

crazed cuckoo maniacal

absurd bananas irrational maniac stupid whacko zany

baked balmy bonkers cracked daft demented deranged dippy flaky flipped-out foolish freaked-out fried half-baked idiotic insane kooky loco nonsensical nutty preposterous psyched-out screwy unsound

logical rational reasonable sensible

sane