I used to have a Chinese friend online, and she would tell me off for saying 'hi mate' because we were not mates.
Suppose it must sound quite odd to people who are not used to it.
Indeed, I just mean it's a very strange evolution of the usage of the word.
It has nothing to do with 'mating' it it just a anglicanism of the Dutch word 'Maat' which means friend.
It transfered into the anglo-dutch word 'Mate' in South Africa and Afrikaans over to the Victorians and so is simply another word spread and changed by the British Empire from one of it's colonies.
Yes. Yes you are OP.
I'm not your pal, buddy.
I find the evolution of the word 'nice' more interesting actually.
I used to think this when I was younger, up until about 16 when I just gave in and started using the word to refer to friends. I don't get it either
edit
Should have read Castiel's post, wish someone would have told me that earlier! In fact when I asked people at the time they had no clue!