(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
1. A partner's other partner; metamour.
2. A person's partner, sometimes but not always a non-primary or non-spouse partner
by Joreth April 08, 2010

"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."
"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

by ?Idk! October 09, 2020

A big, fat, lazy person, with no concept of work ethics. May be overheard uttering "you know what?" This person claims, "I only eat one meal a day?" Tells co-workers to focus more on their jobs and then excuses himself for a 3 hour lunch.
by Ted Kamprad May 02, 2006

oso in town go in the house
by chreme1789 November 13, 2020

oso is on the block we finna die
by chreme1789 November 13, 2020

A thug of large stature. Usually independent of chains of street gang affiliations. Not to be toyed with. Spanish word for BEAR.
by Big O 213 April 27, 2019
