Old fashioned expressions you still use.

It’s raining cats and dogs !

Much to my fashionable nieces’s amusement I say trendy!

*niece’s

'Spend a penny'.

Lady muck of dung hill
Fur coat no knickers
If you can’t fight wear a big hat
Age before beauty, to which we would reply, shit before the shovel ( we were very common)
You can’t make a silk purse out of a sows ear

u and non-u
Vacation

I call DH old fashioned when he uses these phrases.

If you left the door open , ‘were you born in a field’?
Who is ‘she’ the cats mother?
The wind will change and you’ll keep that face.
If you can’t say something nice, don’t say anything.
When asked what there was to eat ‘if it’ , which meant if we had it we could eat it. ( usually bread and jam)
Do you think Money grows on trees?

My life can be replayed in well known phrases or sayings, my mum had one for every occasion. Sometimes when I speak my Mother comes out!

Reminds me of
after the Lord Mayor’s cart … Oopsadaisy

Swimming baths must date me.

Should be “show” not “cart”

That list in the link given by GrandmaT is totally arbitrary. Some expressions are Biblical, some are from the war, some are even more recent. Some are probably Shakespearean. Some will go out of date - that's how language works. I suppose it's up to us to keep the more interesting ones alive, and teach them to the next generation.

You will be laughing on the other side of your face!

Pearls before swine...

Are we astral twins Kate1949(the 49 might be a bit of a giveaway)
Put the wood in th'hole
Fab
Iffit pie
Tha's not made of glass (when stood in front of the telly - do the yoof of today even watch telly?)
You'll laugh on the other side of your face
I'll box your ears

Lucca

If I look a mess.. “ I look like the wreck of the Hesperus”.

An expression I use often Lucca but I haven’t heard many others use it.

San fairy Ann - Ca ne fait rien - it doesn’t matter.
Cedilla not showing?‍♀️

A group of teenagers were being interviewed on TV this week and none of them knew what spending a penny meant. I went to M & S the next day and there were signs in the loo flagging up their two flush system - Just spending a penny? Save the planet. Some customers must be mightily confused!

I use the wreack of the Hesperus.

The word that baffles my grandchildren is pictures as in going to watch a film.

So funny. I always say’ I won’t boil my cabbages twice’ meaning I won’t repeat myself!

Better than a poke in the eye with a rusty nail.

We are in good company if you use wreck of the Hesperus too kitty ?.

I refuse to say I am watching a movie, I am watching a film and it grates a bit when GDs/DDs mention ‘ a good movie’!

I still talk about going to the pictures to see a film, rather than going to the cinema to see a movie.

Behaving like 'the Duchess of Buccleuch'.

Used by my mother, grandmother (b.1897) and great grandmother to refer to someone expected to be waited on hand and foot, or exhibiting unnecessary airs and graces.

I assume that this refers to a contemporary of theirs, but have been unable to delve deeper into which Duchess or why!
Can anyone shine a light on this, please?

Red hat and no drawers
She’s no better than she should be
Blue and Green should never be seen

We could be Nannee. Another wreck of the Hesperus here.
Were you born in a barn?
We still say 'tape' programmes on TV.

I use almost all of those above.
My mother used to say
"It's darker than the inside of a cow's belly". I love that!