Language is as diverse as the people who speak it, constantly reinventing itself as new words and terms spawn, grow old and die out.
The City has its own language down on the street, full of slang and jargon and idioms that can confuse the new.
What does it mean to boil or make? Why should you fear a kiss, and why should you try and rip them?
To help with the lingo of the City there is the The Language of The City to help you out.