old chestnut
informala subject, idea, or joke that has been discussed or repeated so often that it is not funny any more:
I wondered whether there might, after all, be some truth in the old chestnut that one's school days are the happiest of one's life.
Thesaurus: synonyms and related words
Tedious and uninspiring
- anonymous
- antiseptic
- banal
- be (as) dull as ditchwater idiom
- bland
- boring
- drab
- earthbound
- flat-footed
- lifeless
- middle-aged
- mind-numbing
- monochrome
- monotonous
- mouldy
- tedious
- threadbare
- tired
- tiresome
- trite
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