"Løs" is the norwegian word for "loose", it is also being used to describe a person that is promiscious, and has sex with almost anyone. In addition to this it can describe an object that is unsteadily, loosely attached to something or someone...
Hun/han er så forbanna løs!!!
She/he is fucking promiscious!!!

Ballen faller løst igjennom luften
The ball is falling loosely through the air
von Viking87 23. April 2008
Lack of sex
Steph: I'm so horny today

Davis: You're suffering from LOS Steph
von T_B_22 13. Juni 2011
Land of Smiles - a short form for Thailand (aka the Land of Smiles)
Keep notes for each day you are in LoS so you can write up a good travel blog after.
von Reptillian2 28. Februar 2013

Describing something that is a Load Of Shit.
Lea: Those exams were such a LOS
Toto: OMG I know so happy there over

Daphnie: My friend told me she got laid!
Jeremy: brrrt what a LOS!
von Toto van Lea 29. Oktober 2010
A shortened term for "Rathalos" from the PS2/PSP game
Monster Hunter/Monster Hunter Freedom(2).
los flies around too damn much...
von GoD-oF-pHaRtS 2. Mai 2007
laughing out softly
los not laughing out load
von xmel3 5. September 2009
A short form of the term 'lack of snow'. One may suffer this during the summer periods and usually only occurs to skiers, snowboarders etc.
OMG, this summer is so long! I think I'm suffering from LOS.
von alaskantimes2002 28. Juni 2009

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