osaen 

The best girl and probably coolest on tiktok

osaen is the best at tiktok

osaen by anonymous June 22, 2021

Osananajimi 

A commonly-used term in romantic anime, an osananajimi is a friend from infancy, a childhood friend or old playmate with whom one shares the special and intimate understanding that (according to such stories) can only come from having known each other since earliest childhood.

A good example of Osananajimi is Manami Tamura from Ore no imouto

Osananajimi by Edgar4815 November 9, 2010

Osentinistic 

Someone who is scared of a child’s hand going up they’re butt

He is so osentinistic

Osentinistic by Plugwalker213 July 21, 2018

OSMEN 

OSMEN (the soul of Osman I), the creature that rapes men and later eats them along with their soul, taking over their body. OSMEN hunts at night and takes ACT practice tests during the day. OSMEN undergoes a full transformation when under the influence of three intoxicants: weed, alcohol, and nicotine. Even when under the influence of one he will be noticeably more gay.

“Oh shit, oh fuck, cover your ass and run OSMEN is coumming (a combination of cum and come)”

OSMEN by MOUNKIE July 3, 2020

ostentatious ostriches 

group of people who love materialistic things

Oh those ostentatious ostriches only want more rings and diamonds but never want love.

ostentatious ostriches by slimjim256 September 25, 2012

Osaeism 

Randy Osae's dividing of one's subject into 70% informative, 30% opinionated.

Example: your racist aunty is 70% informative, 30% opinionated

Example II: "I like this book, its full of Osaeism"

Osaeism by YoungGunsGoonerTalk July 17, 2010

Semen Ospenis

Any gymgoer who is buff asf and takes roids

Semen Ospenis is big asf

Semen Ospenis by Bicep Bros co. September 6, 2019