What do you think ‘bw’ means?
If I tell you that I received an email from a native speaker that ended with bw, you will be able to guess it easily. Yes, it means ‘best wishes’.
And of course you already know that ‘best wishes’ has already been shortened to ‘best’ for a while.
And if my memory is correct, it used to be ‘with best wishes’.
I remember the first time I saw ‘best’ at the end of an email, I felt quite uneasy about it. “Has the writer deleted ‘wishes’ by accident? If not, what does ‘best’ mean? If it must be shortened, why not ‘wishes’?”
And now, even ‘best’ is not quick enough, so we have ‘bw’. What will happen next? Can we still shorten it further?
And you already know that ‘thanks’ has become ‘thx’; ‘cheers’ has become ‘chz’; ‘regards’ has become ‘rgds’.
The question boils down to:
WHY ARE WE SO BUSY THAT WE DON’T EVEN HAVE TIME TO WRITE OUT BEST WISHES IN FULL?
Postcript: Special thanks to Steph and Olive, who fed me back with lots of information on ‘add oil’.