OSI

Office of Special Investigations.
It's a form of federal investigators for the Air Force. The equivalents are CID for the army and NCIS for the Navy.

Osi special agents asked me questions about my commander yesterday.

by Charlyes December 17, 2017

osi

a girl who is over obsessed with hart styles and one direction that it’s not healthy.

see that girl over there wearing the 1D shirt?

she’s a total osi!!

by harrystyles321098 June 3, 2020

osi

Someone who never listens and embarrass everyone around them

Osi over there is making people stare at us ;-;

by I’m that bitch C; June 11, 2020

Osi

Obeast sad idiot

She’s suck a osi

by Karen from mean girls June 12, 2020

Osi

A dumb ass bitch who is so fucking depressed and lonely and is always ok TikTok

I don’t want to go see Osi

by hi_im_deperresed July 12, 2020

Osi

A osi is someone who Loves art, is bi, loves frogs and mushrooms, uses phone 24/7 shy yet popular

1: "hey who's that?"
2: "ohh them? They're a osi aren't they amazing?"
O: "umm excuse me can you not talk about me right in front of me? Thanks."

-based off of real experience (´；д；)

by ʟᴇᴍᴏɴᴄʜɪʟᴅ May 23, 2021

OSI model

7 All-Application
6 People-Presentation
5 Studying-Session
4 This-Transport
3 Need-Network
2 Daily-Datalink
1 Prayer-Physical

This little trick helps me remember the damn things on the Cisco tests.

by anonymous December 12, 2004