Urban Dictionary: s/n

1.	s/n
	internet term for "screen name" or "user name" whats you s/n on aim? buy s/n mugs & shirts by mad at the world Feb 28, 2003 add a video
2.	S/N
	used in internet slang meaning "side note" This is a really great day. S/N: I can't wait to go to that concert later. buy s/n mugs & shirts side note slang internet talk s/n twitter by T_Squar3d Apr 5, 2011 add a video
3.	s/n
	s/n short for screen name as in an internet name used for talkin with freinds or family. usally therer r aim or aol s/n or yahoo sn s i have a s/n for aim and yahoo buy s/n mugs & shirts by monkeybutt Mar 25, 2005 add a video

4.	s/n
	a name used for instant messageing . Usally aol s/n or yahoo s/n Wat is your s/n for aim. mine is eveildude399 buy s/n mugs & shirts by monkeybutt Mar 30, 2005 add a video