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An acronym for WIfe, siSTER, Business partner, Aunt, Mother. Typically found in the Southeastern United States in and around Tennessee, Alabama, Georgia and West Virginia, but sometimes found as far south as Middleburg, FL.
Dude, he is so related to her that she can only be his wisterbam. Hey, get me another Bud.
by The Evil Minister February 27, 2006
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