Misuse of the word literally.
People who brake (whilst driving) all the way down hills without actually slowing down.
Drivers who zoom past you (when cycling) then slam on the brakes for the traffic jam they’ve reached 1/2 second earlier.
The tv volume being on an ‘odd’ volume setting, although multiples of 5 are acceptable.
People who say ‘haitch’ for the letter ‘h’.
People who say ‘sumfink/nufink’ etc.
People calling everyone ‘mate’, once is acceptable, any more isn’t if I don’t know you.
Misuse of their/they’re/there or your/you’re
‘should of/could of’
I’m dead tolerant me.
Edit: Oh yeah, bike forum…
Tyre logos not being lined up (seriously).
People turning bikes upside down to put wheels in.
Frayed cables.
Tatty bar tape.
Saddles at silly angles on anything but jump/DH bikes
Glasses under helmet straps