apostrophe
Not a piece of urban slang at all, but an important punctuation mark in written English, which I pride myself on knowing how to use correctly.
However, in my definition for Stoke-on-Trent, I have noticed that I made an error and put one in where it didn't belong (story of my life...).
Therefore, I'm putting this in to make myself feel better.
Wow, what a waste of your time if you read all that! Sorry!
It's only correct to put an apostrophe in "it's" if it's "it is", if not, it's "its".