Top Definition
SN:
Side note. Like a P.S.. Usually used on Facebook, Twitter and similar social networking sites.
Facebook status update: He asked, I said yes!!! SN: Registry is at Walmart yall!!!
by kialayo April 08, 2011
1 more definition
SN:
the definition of SN: means sad note. i just asked my cousin today and she told me. alot of people on facebook, twitter, and other social networking sites use it.
SN: i lost my phone today:(, SN: my puppy died:(
by ididjid July 14, 2010

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