アホの一ひとつ覚おぼえ

expression

a fool's one trick; one who repeats the same thing

Derogatory set phrase describing someone who keeps repeating the same limited knowledge or action, like a one-trick pony. Often used critically when someone harps on a single point or method.

See also: 馬鹿の一つ覚え

• 彼かれはアホの一ひとつ覚おぼえのように同おなじ話はなしばかりする。

  He keeps telling the same story like a broken record.

• またその作さく戦せんか。アホの一ひとつ覚おぼえだな。

  That strategy again? You're a one-trick pony.