Sir Osis of Liver

A world-renowned and highly-esteemed hepatologist.

I seem to recall during our last session, Sir Osis of Liver,
that you had warned me against the dangers of drinking vodka for breakfast. Do you think we could go over that again?

by whimzzical May 28, 2010

osie (o see)

Sweet,sensitive,but crazy (loose canon).

She's cool but she's an osie (o see),be careful.

by gx3 January 6, 2009

OSI (Operating System Index)

OSI (Operating System Index) A method to determine the level of geekiness or nerdom in an individual using the number of operating systems they use.

Larry: Lewis has so many damn computer gadgets.
Bill: I know, right? What's his OSI (Operating System Index) then?
Larry: 6

by daygzzz November 4, 2012

Cock-c-osis Breath

Having both cockbreath and halitosis breath at the same time, which makes your mouth foul in any way, shape or form.

Janice's breath was so foul after sucking my dick last night and not brushing her teeth for a week, she had a terrible case of cock-c-osis breath.

by moosehead7 July 29, 2006

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