BBC Radio 4 - Word of Mouth - Slang

http://www.bbc.co.uk/programmes/b06wd268

This radio clip is generally about the history of slang.
In this audio there are talks about how slang has a bad reputation since it used to be associated with criminality. 
There appears to be different reasons for slang such as misogyny, abuse and sex. There is an absence of caring and friendly slang words.
Slang could be thought of as a "linguistic safety valve".
There are discussions about whether slang is mostly dominated by men, however, it is apparent that women use slang too.