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Yomi
あほのひとつおぼえ
Rōmaji
aho no hitotsu oboe
Type
idiom, casual
Literal Meaning
a fool remembering one thing
Meaning
Stupid/Naive people proudly and repeatedly display the same knowledge/idea
Antonym
脳ある鷹は爪を隠す (“a smart hawk hides its talons” = “Really smart or talented people do not show off their knowledge or act pretentiously”)
Additional Info
Also バカの一つ覚え. Obviously, its tone is very sarcastic and provocative.
Example
アホの一つ覚えで彼(かれ)はいつも「AIをもっと使うべきだ！」と言(い)っている。
Just like stupid people proudly and repeatedly stating the same idea, he’s always saying “We should use AI more!”.