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it means that there is a slight chance that it will happen .
it is a possibility.
different from "not ever" meaning never in a lifetime, but "not never" means maybe , maybe not , not saying i never will.
A : you will eat mcD's
B : not never .


A: will u never eat mcD's
B : Not never , i might.
by yourDesiree May 23, 2010
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