一ひとつ覚おぼえ

noun, noun which may take the genitive case particle 'no'

one's only trick; the one thing one knows; a one-track mind

Often used critically to describe someone who keeps repeating the same idea, phrase, or method because it is all they know. Common in the phrase 一つ覚えのように.

• 彼かれは一ひとつ覚おぼえのように同おなじ話はなしを繰くり返かえす。

  He repeats the same story like a broken record.

• あの政せい治じ家かの演えん説ぜつは減げん税ぜいの一ひとつ覚おぼえだ。

  That politician's speeches are all about tax cuts—it's his one and only message.