Top Definition
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
by hutch August 05, 2004
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
by Thatguy10101 June 03, 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!
by mshu July 06, 2013
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
by Wait................Shit September 01, 2009
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