big, large, great

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

専門バカ: specialist fool

馬鹿: stupid, foolish

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

馬鹿: huge, very, absurd

馬鹿: enthusiast, freak

elephant

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

disgraceful, shameful, indecent / shabby, unsightly