a sister that sometimes acts like a retard
"My sistard here just chugged sixteen beers and she wants to drive us home:
by Lindsay Duff August 05, 2007
Sistard sĭs'tärd' - noun - female offspring having both parents in common with another offspring; also a female sibling; that is also slow, dimwitted, and/or appears mentally challenged with the severe level of intelligence deficiency, yet is allegedly cognitively normal according to the standards set by society.
My Sistard drives me to intense feelings of fratricide.
by Wraith0 April 05, 2010

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