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1.
ost
Original Soundtrack
by Anonymous September 08, 2003
 
2.
OST
Short stand for "Original Sound Track".

-Recorded music accompanying and synchronized to the images of a motion picture, television program or video game
-A commercially released soundtrack album of music as featured in the soundtrack of a film or TV show
-The physical area of a film that contains the synchronized recorded sound.
Guy1: hey Guy2 i just got the OST "The Eye of the Tiger" from the movie Rocky III to my iPod.

Guy2: cool Guy1, let me listen to it.

by netoxic January 23, 2009
 
3.
Original Sound Track

-''Hey did u heard da OST from grease?''
by cApRiiCoOl August 20, 2008
 
4.
Ost
Norwegian for cheese
Oh noes Ole! Your hode looks like en ost!
by bobolamedbukkake October 30, 2004
 
5.
Ost
AND swedish and danish for cheese.
" -Faaaan va gott med en ostmacka."
or
" -Du, flensost är inte så fräscht!!"
by Jörgen M April 29, 2005
 
6.
OST
OST - Optimum Scoffing Temperature.

Applies to food brought from late night burger bars or takeaways that is a perfect temperature to simply devour without breathing.
Man, that Kebab was OST, it didn’t touch the sides.
by 2Ace May 22, 2009
 
7.
ost
An ostentatious way of saying 'ostentatious', ironically.
Wow, those big celebrity glasses are just, like, so ost!
by ahd August 06, 2007