sis Definition
Definition
A form of address or reference for a female sibling, especially one's older sister. It is often used as a term of endearment and can also be part of slang or internet culture to denote a close female friend.
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A form of address or reference for a female sibling, especially one's older sister. It is often used as a term of endearment and can also be part of slang or internet culture to denote a close female friend.
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