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!!!

SN: by kialayo April 27, 2011

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:(

SN: by ididjid July 15, 2010

SN 

Say nothing

(A and B talking on text )A:" ill give you the £5 tomoz yeah" B: "iyt sn"

SN by blackmanpacefc@fifa13 December 6, 2015

SN 

SN- Say Nothing - Don't worry about it, it's no big deal.

"Safe for lending me that money fam"
" SN "

SN by @frica94 November 14, 2016

Sn 

Say nothing

Girl: I hate you

Boy: sn

Sn by Chikacheeksxo October 13, 2018

sn 

SIKE nah

Andrew: I hu with Amelia today

John: bruh no way
Andrew: sn shes ugly lmao

sn by ohnosis! May 11, 2019

sn 

An acronym for "say nothing". Typically used in text when someones pissed off and doesn't feel that the other person deserves to speak.

Twat -" I didn't mean to fuck your girlfriend"
You -"sn"

sn by joeboy44 June 21, 2016