Top definition
Your real, genuine, full-blooded sister. Normally, such a title is irrelevant, unless you are introducing someone to your sister-in-law, half sister, step sister, bridge sister, side-step sister, and/or skip sister.
TOM: And this is my genesister Gwendolyn.

ANDREA: Wow! This is your REAL sister?

TOM: Yep!
by Fryt Jiope July 14, 2006
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