(old) chestnut

(old) chestnut

A topic, saying, or joke that has been repeated so much that it has become boring or irksome. Whether there's truth in it or not, I can't stand that old chestnut "follow your heart."
See also: chestnut
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

old chestnut

A stale joke, story, or saying, as in Dad keeps on telling that old chestnut about how many psychiatrists it takes to change a light bulb . This expression comes from William Dimond's play, The Broken Sword (1816), in which one character keeps repeating the same stories, one of them about a cork tree, and is interrupted each time by another character who says "Chestnut, you mean . . . I have heard you tell the joke twenty-seven times and I am sure it was a chestnut."
See also: chestnut, old
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

an old chestnut

or

a hoary old chestnut

mainly BRITISH
COMMON If you describe something that is said or written as an old chestnut or a hoary old chestnut, you mean that it has been repeated so often that it is no longer interesting. Finally, how do you answer that old interview chestnut: `Why should I hire you?' The film is based on the hoary old chestnut of good twin/bad twin, separated at birth, final fatal meeting — you get the idea.
See also: chestnut, old
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

an old chestnut

a joke, story, or subject that has become tedious and boring as a result of its age and constant repetition.
The most likely source for this sense of chestnut is in the following exchange between two characters, Zavior and Pablo, in William Dimond 's play Broken Sword ( 1816 ): ZAVIOR…When suddenly from the thick boughs of a cork tree— PABLO. (Jumping up) A chesnut, Captain, a chesnut…Captain, this is the twenty-seventh time I have heard you relate this story, and you invariably said, a chesnut, until now.
See also: chestnut, old
Farlex Partner Idioms Dictionary © Farlex 2017

old chestnut

A stale joke, anecdote, or adage. This term has a specific source, the play The Broken Sword by William Dimond, first produced in 1816. The principal character, a Captain Xavier, constantly repeats the same stories, one of which involves a cork tree. Pablo, another character, interrupts, saying, “Chestnut, you mean, captain. I have heard you tell the joke twenty-seven times, and I am sure it was a chestnut.” The play has long since been forgotten, but the term survives, and has itself become an old chestnut.
See also: chestnut, old
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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