Bad spelling and grammar.
My husband's supermarket walk. Walks perfectly normally everywhere else but as soon as he's in a supermarket he shuffles along soooo slowwwly even in we were just meant to pop in for a couple of things.
People pronouncing 'h' as haitch rather than aitch.
People saying disinterested when they mean uninterested (yes I know language develops).
People I'm walking behind on a crowded street suddenly stopping dead to look at something or do something on their phone so I nearly walk into them.
People saying literally when they mean figuratively.
People who say ATM machine and pin number.
The National Express website. I never pre-book seats as they're all at the front and I prefer the back. So I press the 'no' button and it goes to the next page where I immediately get a big urgent pop up warning me I haven't booked a seat and have to press no again. Like I did literally seconds ago. Funnily enough I haven't changed my mind in two seconds!
Ex workmate used to say penultimate when he meant ultimate. And he'd say it a LOT.
My bloody phone autocorrecting in to on and into to onto (just remembered this one as I see it just did it on this post!).
I could go on but I'd be here all day 🤣