People who say:
"My bad"
When you purchase say, a couple of drinks at The Amex and it comes to £11.10.
You proffer £21.10 in legal tender, dribbling in anticipation of a crisp, plastic Ayrton.
"Sorry, no notes" so get a pocketful of shrapnel in the form of 10 x £1 coins.
Barber OUT.
Not being able to get all the digital clocks in the kitchen (2 x ovens, microwave, phone and scales) to click over at the same time when you adjust them to/from BST.
You have a clock on your kitchen scales? Pray tell - why?
On topic: people who say “pray tell”.
People who have 'No turning here' signs on their drives
The modern ring pulls on cans, get up my nose.
Supermarket cashiers who either decide to load the bags for me - unaware that I am better than them at it, or that I wouldn't leave a supermarket with a newspaper at the bottom of a full bag - or provide a bag after all items have been whizzed through at a lightning pace, leaving me to seem a dawdler if I expertly pack, causing me to become a flinger and a shover to deflect the hateful stares from the next person in the queue.