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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Do you class knackered as swearing?

264 replies

DisappointedD · 14/01/2026 19:36

I have always thought of it as a mild swear word. A word I wouldn’t want my younger children using but wouldn’t be too bothered by a teen (but not to their grandparents) type word.

There is a current radio ad using the word which made me think about it earlier. I was surprised when I heard it and didn’t think it was a word I’d heard used in ad’s before.

OP posts:
Springtimehere · 15/01/2026 05:18

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thornbury · 15/01/2026 05:20

I was told off for saying it as a child and I don't think I've ever used it since! I understand its origin is the knackers yard where old unfit work horses went to be killed.

ohyesido · 15/01/2026 05:21

I remember being told off by my DF for using the word as a child, and being confused. I think it’s because it relates to genitalia in some tenuous way

Lurkingandlearning · 15/01/2026 05:36

It’s slang rather than a swear word. I wouldn’t want to hear young children using slang. There’s time enough for that

Thepeopleversuswork · 15/01/2026 06:23

I find it bizarre that people are being so authoritative in their responses here as if they had drafted the dictionary definition. Language isn’t a science where theres a definitive yes or no.

I have heard both connotations (the knackers yard one and the post sex exhaustion one): my mum used to warn me to be careful with its usage when I was younger. I can well believe that it had that association although its old now.

But the whole point with language is that its meaning changes all the time and is defined by the people who use it. Just because you, Jane Bloggs, have not heard the association with being tired after sex doesn’t mean it can’t be correct.

FlatErica · 15/01/2026 06:41

It’s not a swear word. Do you think horses that get sent to the knacker’s yard to end up in a yard full of testicles? It just means exhausted and clapped out. (Clapped out as in worn out, not as in suffering from the clap).

Waitingfordoggo · 15/01/2026 08:30

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We can be weird yes, but also language use varies between English speaking countries. eg the different use of ‘fag’ between USA and UK? Also a certain ‘r’ word (referring to learning disability) was acceptable in the US for a long time but not here. (Not sure if that is now changing now in the US.)

HRTQueen · 15/01/2026 08:41

when I was young knackered was slang for tiredness after sex so if an adult said this it was either hilarious especially to young teenagers or 🤢

yes crap was a swear word too I wouldn’t have said it in front of an adult

cinquanta · 15/01/2026 08:44

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As weird as Australians who pronounce router incorrectly simply to avoid it sounding the same as a local slang word for sexual intercourse.

WellMaybeYouShouldntBeLivingHeeeeeeee · 15/01/2026 18:14

Thepeopleversuswork · 15/01/2026 06:23

I find it bizarre that people are being so authoritative in their responses here as if they had drafted the dictionary definition. Language isn’t a science where theres a definitive yes or no.

I have heard both connotations (the knackers yard one and the post sex exhaustion one): my mum used to warn me to be careful with its usage when I was younger. I can well believe that it had that association although its old now.

But the whole point with language is that its meaning changes all the time and is defined by the people who use it. Just because you, Jane Bloggs, have not heard the association with being tired after sex doesn’t mean it can’t be correct.

But the reverse is also true, right? — just because Jane’s cousin Jackie Bloggs has heard the tired-after-sex meaning does not mean the word is objectively rude when Jane says it. Or that it simply “is” offensive or rude and shouldn’t be used by children or in polite company.

MissCooCooMcgoo · 15/01/2026 18:17

oilead · 14/01/2026 19:39

It used to mean a specific type of being tired. As in, after sex tired.

Yes this. This is what my dad told me it meant.

ginasevern · 15/01/2026 19:06

It's not a swear word by any means and it derives from the knackers yard where horses are slaughtered. But it is slang and ideally not a word you'd use at the Royal Garden Party or a job interview.

Thepeopleversuswork · 16/01/2026 07:02

WellMaybeYouShouldntBeLivingHeeeeeeee · 15/01/2026 18:14

But the reverse is also true, right? — just because Jane’s cousin Jackie Bloggs has heard the tired-after-sex meaning does not mean the word is objectively rude when Jane says it. Or that it simply “is” offensive or rude and shouldn’t be used by children or in polite company.

Of course. But the dismissive and self-important tone of some of the "that's nonsense" responses is just stupid.

liverpoolnana · 18/01/2026 09:17

HandMadeInYorkshire · 14/01/2026 19:51

Knackers (in Yorkshire) was another name for bollocks, so it was seen as a swear word, same as 'fart', that was also known as a swear word.

Makes me look at the nursery song 'Knick knack paddywhack' in a new light.

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