Much like townies but usually found in South London in a horrible place called Mitcham.
It is considered to be very rare that a mitchamite makes it to 16 years old without having an offspring (or 2). Mitchamites often take care of their young by enclosing them in a smoke filled drinking establishment aka pub. very few mitchamites make it to higher education (A-Levels).
It has been rumoured that mitchamites are actually pikeys that were forced to settle much to the stupiditiy of the local council who forced them out of caravans and into housing estates whereby they now attempt to adopt the YardieGang lifestyle.
They can be heard from long distances, their trademark phrases include "init" and all words starting with th are replaced with f's for example, "thought" becomes "fought", "think" becomes "fink" and so on. Some people believe that this is why they steal but only if something has the word "three" on it.
For an alternative view on Mitcham see also http://web.ukonline.co.uk/honor.m/towns/mitcham/mitcham.html