馬ば鹿か正しょう直じき

na-adjective

honest to a fault; foolishly honest; naively honest

Describes someone whose excessive honesty leads to disadvantage or social awkwardness. Often used critically or affectionately.

• 彼かれは馬ば鹿か正しょう直じきだから、秘ひ密みつをすぐに話はなしてしまう。