OSO

(Other Significant Other)

1. A partner's other partner; metamour.

2. A person's partner, sometimes but not always a non-primary or non-spouse partner

This is Bob, my SO, and this is John, my OSO

This is Bob, my husband, and this is Jill, his OSO

by Joreth April 8, 2010

OSOS

An acronym for the term "On some other shit"

It is used to describe someone being off topic or saying something extremely irrelevant to the situation. (Or blabbing on about a bunch of nothing)

Bitch, you is OSOS.
My girlfriend is always OSOS!
I'm not even talking about that, you OSOS.

by lisa4queen August 20, 2014

oso

a word you say before you diss or give props to something or someone

junior: my gsx is gonna pwn so many noobs!!
goofy: dude, you're not even gonna get your oso gay gsx, so stop fiending out!!

by EliasC August 18, 2006

OSO

"Other significant other". A non-primary partner in a polyamorous relationship; a fuck buddy or friend with benefits.

"meeting new OSOs always makes me nervous."
"My SO found a new friend online; she's already talking about making him an OSO, which kind of squicks me."

by guyjin March 23, 2007

OSO

The Don , Top Dog , The king.

OSO said to do it. So I did it. It was OSO so I had no choice.

by ?Idk! October 9, 2020

oso

a stuffed teddy bear on playhouse disney who is a bit special...
oso special in fact

little kids love him and adults get to rip him

oh no! i don't know how to tie my shoes! it's ok, special agent oso is here to help me! no... wait he can't do it either.

by jezzimommy May 20, 2010

oso

mafiOSO, mafia, mob, vice lords, CVLN

I'M OSO FOOL, he's traight oso dog

by koop da kid May 4, 2006