old chestnut
US /oʊld ˈtʃɛs.nʌt/
UK /əʊld ˈtʃɛs.nʌt/
慣用句
古いネタ, 使い古された話, 陳腐なジョーク
a joke, story, or saying that has been told so often that it is no longer funny or interesting
例:
•
Oh, not that old chestnut again! I've heard it a hundred times.
ああ、またその古いネタか！もう百回も聞いたよ。
•
His speech was full of old chestnuts and clichés.
彼のスピーチは古いネタと決まり文句でいっぱいだった。