Top Definition
The half sister of my half sister or half brother.
Amy and Randy had Josie. Randy and Patty had Vanna. Patty and Bob had Andy.

Vanna is Josie's half sister.
Vanna is Andy's half sister.
Josie is Andy's quarter sister.
Andy is Josie's quarter brother.
by onegreenfroggie August 15, 2009

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