An ostentatious way of saying 'ostentatious', ironically.
Wow, those big celebrity glasses are just, like, so ost!
by ahd August 6, 2007
An act of plagiarism and claiming it as your own.
Wow dude you just totally OSTed that essay from the Internet.
by KoolKats99 July 24, 2016
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
To overcome seemingly unsurmountable odds surprising everyone around that person.
Jose pulled off an Osting yesterday at the game.
by Gameness March 2, 2007
anyone with the name/last name Oste is the most caring, amazing, beautiful person on the earth. they always are there for you and you can tell them anything.
by davian haines October 17, 2020