osm 

meaning the same as awesome

That is one osm bike.

osm by hyrulexx May 1, 2006

OSM 

Entry: PRONOUCNED ->Awesome
Synonoms: Very Awesome, Pretty Awesome, Ridiculously Awesome, Sean "Guy" Capri, Disgustingly Awesome etc.
Antonyms: Umm... Not Sean "Guy" Capri
Come on look alive, Hutch...HUTCH!!!

1) That was Osm!
2) " Sean you are OSM"
3) Isn't Sean Osm??? He's seriously hot right now

OSM by hutch August 5, 2004

Osm 

an abbreviation for awesome
osm=awesome

(when typing):
that was so fucking osm!!

Osm by Garola April 17, 2009

OSM 

Oh Shit Moment

Like someone's Instagram photo from 48 weeks ago... OSM

Sitting on your bed masturbating and your mom walks in with laundry... OSM

OSM by Thatguy10101 June 3, 2015

OSM 

An acronym for "OH SHIT MOMENT"..

You've just realized its your wedding anniversary,.. and you're sitting at the dinner table across your spouse.
You've just polished off a salad,.. and you realize your gold filling is gone.
You're gf/bf wanted you to download music for thier ipod,.. and you've accidently erased everything.. OSM!

OSM by mshu August 7, 2013

osm 

osm = Oh Shit Moments

osm, i put my foot in it

osm by BeckyL October 21, 2010

OSM 

Meaning "Oh shit! Moment"

Can also be spelled OS!M

From the Sookie Stackhouse books

Guy 1: Isn't that Amy chick smoking hot
Guy 2: Yeah but I hear she has a huge bush...I'd still fuck her.
*Amy is watching the whole exchange behind guy 2's back*
Guy 1: Ouch...what an OSM

OSM by Wait................Shit September 1, 2009