S/O 

Short for “significant other”

One day I would love to go on a picnic date with my s/o

S/O by ChimCo September 14, 2020

S/O 

Shout outs to _______ . A commonly abbreviation used on Twitter.

S/O to my nigga @TRAGEDYKHADAFI7 it's good to have you home.

S/O by mikeyrocks September 2, 2010

S.O. 

Abbreviation for "Significant Other". The gender-neutral way to refer to someone's boy/girlfriend.

I'm having a party at my place. Bring your S.O.!

S.O. by The Grammar Nazi November 10, 2001

S/o 

Short version of saying shout out

May:shay give me a S/o
Shay:ok boo

S/o by lilcece March 18, 2015

s/o 

"Shout Out" meaning dedicated to someone

S/o Mac Tyer, j'veux qu'ma bitch aille en SLK chez le pédicure

s/o by RUTΛ June 11, 2021

s/o 

(a) significant other(s)

My boyfriend is my s/o.

s/o by alone_and_lonely May 13, 2005

S.O. 

Means "significant other".

Hey, stop macking your S.O. and go home.

S.O. by unicore November 19, 2006