rea is just laziness or local slang. Hope that helps.
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It's appropriate in informal speech. It's only used in American, Canadian and Scottish English.
Google isn't an appropriate means of determining whether something is correct or not. The Oxford English Dictionary, which is what I used, is.
Also, while a number of results does indicate that it may have entered common usage, a lack of results doesn't necessarily mean that it hasn't.
and I suspect we really don't disagree very much anyway.