ばかのひとつおぼえ
one who knows little often repeats it; a fool's one bit of knowledge
Also written バカの一つ覚え、バカのひとつ覚え、ばかの一つ覚え、ばかのひとつ覚え
Expression
馬鹿ばかの一ひとつ覚おぼえ。
He that knows little often repeats it.
馬鹿ばかの一ひとつ覚おぼえのように、インターネット、インターネットって言いうなよ。
Is that all you can talk about - the Internet?