Are these phrases ‘unsophisticated’?

[ZebraAntics]

British English is not my first form of English that I learned, I learned American English first (that autocorrected to American Elvish which would have been much better, but anyways). Since moving to the UK I have picked up a lot of different phrases and I have since been told by one (granted, rather posh person) that the phrases I have picked up are problematic and make me seem unsophisticated.

Example phrase 1:
That’s done for it.

Example phrase 2:
That’s a good shout.

Example phrase 3:
Give your head a wobble. (This one is my favourite)

I’m not going to stop using phrases I like but it does make me wonder, are there other phrases like this considered ‘rough’ or whatever unsophisticated is meant to mean? Are these even rough or is he just a snob?!

Interesting:

Infra dig is a shortened form of the Latin phrase infra dignitatem, meaning “beneath one’s dignity.” It’s used to describe something that is considered unworthy, degrading, or beneath the status or standards of a person.

Have no idea what formatting weirdness made my * disappear and replace it with bold text btw!

Example phrase 1:
That’s done for it.

I have never hear of this phrase.

Example phrase 2:
That’s a good shout.
I don't think this phrase pertains to any class. I say, 'Jolly good shout!' sometimes.

Example phrase 3:
Give your head a wobble. (This one is my favourite)
Ghastly phrase. Nothing to do with class, it's just trite and condescending.

I need to use jolly good and ghastly more…especially ghastly.

You're not using number 1 correctly so that's probably why it's sounding wrong to those around you. I would use it if I had had a warning at work and accidentally made the same mistake again, I'd then say to a friend "I'm done for". It'd mean that that's the last straw and now I'll be fired. Or if I had a bad relationship with MIL and staying at her house was going terribly, if I then broke her favourite plate if say to myself or DH "that's done it" (that's totally ruined any chance of a good relationship with this woman) or "well that's me done for" (she may actually kill me now).

Number 2 is totally fine if someone gives a good idea in a work meeting but I think it'd be weird in other circumstances. For example, if someone suggested going for a coffee I'd say it was a good idea. It's a good shout would only sound right in an episode of Neighbours.

Number 3 is, as most have said, only really heard on Mumsnet and it'd be very rude to be said to someone in real life. If I was annoyed about someone else I may say to DH that the person needs to give his head a wobble but DH would probably look at me confused because it really is just a Mumsnet thing.

It's a lovely phrase but not sure my Lancastrian accent would do it justice. Same as thin end of the wedge, a very well spoken woman on a Radio 4 phone in used it as in "that really is the thin end of the wedge" and I cursed my common roots.

I think no 3 is very popular on mn because it implies absolute authority by the speaker, of an old fashioned, disrespectful kind. The kind where it’s ok to humiliate your subordinates. You know how teachers used to say awful things to pupils, berate them for being stupid, essentially, and even throw things at them? That’s not considered good practice now. I think some people on mn would love to have that kind of untouchable rude violent authority, and so they pretend they have it on the internet. That’s why you never hear that phrase in real life.

Or tip top, I like tip top.

@ZebraAntics

'I need to use jolly good and ghastly more…especially ghastly.'

I also use the word ruddy a lot.

@TorroFerney That's made me really laugh! I can't think of a single instance where I could contrive to use it but it's very funny.

1 and 2 sound very working class and quite unsophisticated. I would be quite shocked if somebody said “that’s done for it” in an unironic way.

Never hear number 3 until I joined MN and still never heard it IRL.

If you'd written your 3 phrases and asked me to guess where you were from I would have said the north of England. I've lived in the north west / yorkshire all my life and wouldn't be surprised by any of them, including the "it" on the end of "that's done for it". I'd use "good shout" in conversation. I probably don't use the others but only because I have other phrases I prefer in those situations.

It wouldn't seem unsophisticated to me (and if it helps people generally think that I'm well spoken / a bit posh - certainly round here!)

I am of an age when "that's done for it" was in common use. "That's done for" is the short term dropping a glass one. "That's done for it" has longer term consequences and could apply to negative events affecting journeys, relationships, business contracts etc. if you found a house you wanted to buy and then discovered that it was built on a flood plain, would be one example.
I use it, but then I still talk about frocks, much to my granddaughters amusement....

Good guess! I’m in North Yorkshire but spent a lot of time in Lancashire as well.

... granddaughters' amusement
"That's done for it" definitely common in posh RP English.

They're all completely fine spoken but aren't something you'd write outside of a messaging app. None of them are offensive (apart from maybe telling someone to their face about their head! )

So that’s done for it is much more dire. What if the glass was an heirloom glass as opposed to a cheap everyday one, then would it be appropriate? Or still no?

Interesting. In the single glass ' that's done for it' sounds weird to me, but in the pp context it doesn't. So I guess it's more dire but also more a broader thing, like a holiday, or an entire event and not a single object. I think it's maybe more abstract and less present tense as in with the glass you are literally looking at the thing that is done for, if you cut yourself on the glass and had to cancel your holiday you could say that's done for it as referring to the trip.
I think the 'That' needs to be referring to a happening and not an object to warrant the extra it. I have no clue why though !
Really hard to quantify but I know it when i hear it 😅

I see 'give your head a wobble' as a completely lighthearted and friendly way of suggesting someone is being a bit daft. That someone has taken a weird and overreactive take on something or is choosing to be obtuse

I find it peculiar that people feel it's rude or suggesting they are mentally unwell 🫤

It's something I'd think was used between people who are relatively close to each other.

It's also different for people. "She's done for!" is quite dramatic.

It is really about consequences. "I have broken the heirloom glass, now I won't get anything in her will"".
Also if you dropped something in the road which could be saved and then someone drove over it.

I've never heard No.1. Numbers 2 and 3 are colloquialisms (and as someone else has mentioned, I've only heard No.3 on here!).

Now I’m wondering if there are any other MN-only phrases?

I have never heard anyone use number 3 except on here.

The other 2 are fine.

I wouldn’t say they’re unsophisticated, I’d say they’re colloquial, and there’s nowt wrong with that!