ぐてい

  1. noun (common) (futsuumeishi)

    (one's) younger brother
    humble (kenjougo) language

  2. noun (common) (futsuumeishi)

    foolish younger brother

    • ども、愚弟がお世話になってるようで。
      Thanks, I hear you've been taking care of my little brat of a brother.