someone who is only knowledgeable within the field in which they specialize; a fachidiot

専門バカ: specialist fool

Mr., Ms., a more formal title than さん (-san) but not so respectful as 様(さま) (-sama)

palace, hall, temple / lord, noble

a feudal lord

馬鹿: stupid, foolish

馬鹿: idiot, fool, silly person, dolt; jerk, insensitive person; stupidity

馬鹿: huge, very, absurd

馬鹿: enthusiast, freak

Someone who has poor handwriting, especially poor knowledge of writing kanji characters, due to habitual use of Japanese computer text input methods rather than pen and paper.