Noun
madness; insanity; madman; lunatic; crazy person
SensitiveDerogatoryUsually written using kana alone
デルバートは気違いだと思うよ。I think that Delbert is crazy. Noun, Noun, used as a suffix
mania; craze; obsession; enthusiast; maniac; fanatic; nut; freak
SensitiveUsually written using kana alone
Also written 気狂い【きちがい】、基地外【きちがい】、既知外【きちがい】