AIBU to snap after my mum kept calling a bike a trike?

Probably, though it's the kind of thing only you can know.

I agree with others that you need to talk to her less about this kind of thing if you feel she's purposefully missaying details to upset you.

Because evryone knows that Bi means two and Tri is three and 5 year olds don’t have three wheeled cycles

Some 5 year olds have 3 wheeled cycles. Some adults do too - my adult daughter has a trike because she finds it easier to use and it has a larger basket on it than a bike could have without a trailer, which for her balances out the cons of it being slower than a bike.

A bike and a trike are two different things.

It's not a matter of preferring one term for an object over another equally correct term, or even preferring one modern term over an older term.

I've voted that you're being unreasonable because you know your mother is trying to wind you up yet you still "bite," Next time she wants to talk about trikes, talk about trikes, she'll soon stop if she's not getting a rise out of you.

That’s what you picked up from my comment?

Im well aware of what gaslighting is. Doesn’t mean other people don’t accuse DHs of gaslighting over everything on MN.

Omg I would have done the same. It just feels like a lack of love - like you're not worth paying attention to.

A bungalow is a type of house, so why would they find it annoying?
Houses don’t have to have more than one storey.

I'm, unintentionally, winding up dgs.
I keep calling him by ds name.
Then yesterday when watching a film with Jim Carrey as the lead I mentioned 2 other films he was in but it was actually Mike Myers!
I'm honestly not doing it on purpose but dgs is getting a bit irritated.

I do know the difference between a bike and a trike though. 😇

I can't ever imagine screaming and swearing at my mother for whatever reason . That is less acceptable than using the wrong word for a trike /bike . Get a grip .

in that case, you'd think by now you could ignore it because face it if its deliberate she just pwned you big time.

I have a relative that says bokkle and hospikal. They know it gets on everyone's tits and yes it is done for attention seeking. DP will have similar behaviours sometimes e.g. asking stupid questions like "so how do I cook this microwave meal" - he knows the instructions, they are on the packet, all attention seeking and look at me being so useless/unable to talk properly/being thick.

It gets weary but I wouldnt shout. I now ignore DP completely when hes like that and the relative gets a "sorry i dont know what you mean" - try that with your mum.

I would have done the Sam's
It's irritates tulhe heck out of me when people don't listen/ call things the wrong name

Quite.

Haven’t you ever said “im thinking of getting DC a xxxxxxx because they are outgrowing Xxxxxx”.

It’s quite normal. I’ll realise something needs upgrading and then start saving for it.

Last time I mentioned I thought ds was outgrowing his home it was 3 months before I got a new one. Because I noticed in January when we didn’t go out much on it and decided I’d wait until the weather was nicer in case he had another growth spurt before purchasing a new one for the summer where he’d get lots of use from it.

Screaming and swearing over a mild annoyance.

YABVU and out of order

My mum has for for this OP and it is really frustrating. I'm not sure why she does it. It's been happening since I was a child, so not dementia or recent cognitive decline (my Dad does have dementia so I have some experience of this).

You were wrong to lose your temper and swear at her. But I feel your pain.

I find the easiest strategy for me is to ignore it.

Have you bought the trike yet?
Yes, we have bought her a Isla bike, they get great reviews and are really lightweight. Here's a picture.
Does DD love her trike?
She's figured out pedalling really quickly, we're really proud of her.

Just deprive it of oxygen.

It grates because it is showing you that show your mum doesn’t listen to you and isn’t taking an active interest in your and your families life. If she has always done this, it is to annoy you and you’ve let it. Hard as it is you need to ignore this behaviour to protect your sanity. Be mindful what you tell her in future if she goes on about things to annoy you. If it’s new then yes it could be dementia but it sounds like she likes pressing your buttons.

I suspect it indicates mum doesn't read the room very well or that she's deliberately teasing.

Do you pronounce it “Kah Rah TAY!” like Ross from Friends OP?

You know she was trying to wind you up so why rise to it? Why the need to correct her every single time?

Stop talking about these things to her and if it comes up, ignore her using the wrong word, stop correcting her and she'll soon get bored if you don't react.

That’s the point!

OP knows her managing and doing it on purpose.

It’ll annoy her mum if OP suggests it’s because her mum is unwell and ignores the purposeful spite behind it.

Nah you're fine. My mother is staying with us for 3 months like she does every summer. I often lose my shit over the small things. I feel bad but it's relentless.

No, not everyone knows, and that doesn't address the issue of how the OP knows her mother is doing it deliberately.

She may be, it might be ignorance, it might be mental health issues, all I wanted to know was how the OP knows it's deliberate. Her medical qualifications would help.

I learnt with my mum to pick the right battles. It’s not worth it.

One day when your mum is gone you will think why did I bother arguing about a kids bike.