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1.
A term of endearment between bffs, deaper then a girlfriend relationship.
Someone who is your friend by birth, your sister by choice.
hey sistafriend what ya got going on today?

Sistafriend! Did you hear...
by AnjewlnWhite April 23, 2009
 
2.
more than an acuantaince less then a bestie somewhere in the middle
by J.Llo December 02, 2009