Thanks
@Dave and
@The Judge @Ursa major ; All of that is very helpful.
Surprisingly, beyond regional usage, class structures, educational levels and so on, the 'Mockney/Cockney' point also bears more weight than we might initially grant it. What transcends those neat little boxes is the need for people to project their self-perceived persona, try to fit in or even bond with others that come from very different life experiences.
Though I question this fact with some here, I assume most of us were young at some point. During that maturing I expect that most people, impressed by this group or that, wanting to seem 'more/less' or different as they shape their identities, made use of slang. The whole hep/hip/cool/sick/etc. aspect seductive as we strive to be accepted and admired.
That aspect, the use of and varied reasons for slang is why this interests me and why I'm considering integrating this intentional 'misuse' of a word into the pidgin I've developed. Superficially it 'seems' like a lot of effort for a single use of a word for a fictional piece... but, when it rings familiar with some, it makes the effort appear just that much more genuine.
As a side note: Another 'rarely' used word I'm integrating (pidgin-ized), "powstabawx" for a mail post-box (mail-box), has already jogged the memories of some folks who recall their mothers or grandmothers using a word that sounded similar or the same. Their response was then to carefully scan over the lexicon looking for other words, then, true or not, 'remembering' others (though more likely faintly remembering something similar). Suddenly, in their minds, that developed pidgin becomes real.
Thanks everyone for your help!
K2