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					Originally Posted by Kevin the Carrot  Again
 heard of
 
 under 1%
 
 outside central london
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 I'm certain that you know this isn't true, unless you genuinely believe that 99% of the English speaking world lives under a shell. There's not much point in discussing it if you're going to let your feelings on the topic over-rule anything sensible. 
There might be some good and true reasons for it not to be added to the dictionary - "only 1% of people have even heard that definition" isn't one, it's just so obviously untrue.