1 definition by diorznotwar

Top Definition
A very close and dear friend. Someone who is, or whom you consider, to be a sister. Someone who will never let you down and be by your side for life.
My sister gets mad when I call her 'sissy', but I know deep inside she loves me!
#sister #best friend #sibling #friend #cutesy
by diorznotwar June 13, 2007
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