What does OST mean?
On Second Thought
Other definitions of OST:
Original Sound Track
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How to use the term OST:
There are no example uses of OST at this time. We would greatly appreciate your contribution if you would like to submit your own!
More slang terms:
Offensive term for a white person
DON'T f**kING CARE
Text me back as soon as possible
Look The Teacher Is Coming