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An acronym used among theologians meaning, "Once Saved Always Saved", which refers to Eternal Secuity. That is, you cannot lose your salvation.
Some Christians believe in OSAS, while others do not
by JohnJohn1186 September 27, 2005
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2
1. Nickname for a 60+ year old hooker with saggy boobs.
2. The smell of burnt pubes.
3. A creature native to the scandinavian islands that is a major tourist attraction.
1. Person 1:See that hooker over there?
Person 2:Yeah shes an OSA!
2. Person 1:Awww what smells like osa?
Person 2:My burnt pubes, can you drive me to a hospital?
3. Person 1:Have you seen the Osa yet?
Person 2:What?
by false April 08, 2005
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3
a big black man that loves white women
"that osas just stole my woman.
Lets git him Gus."
by chaka jaliwa May 01, 2005
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4
Church of Scientology's Office of Special Affairs.

May refer to Anonymous gathering information on someone, like possible scientologists, using OSA's own methods.
"Odd username. Can you OSA it?"
-"Yeah, hang on. Ok I got his name, adress, phone number and facebook account."
by Amidoinitrite March 04, 2010
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5
Overwhelming Sense of Apathy

Medically unrecognised addition to the collection of overused psychological acronysms applied to normal teenage behaviour.
"I could have done something about it, but my OSA was acting up."
by skate_08 August 16, 2008
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6
1. Ocean, peaceful, serene
2. Peaceful Vibes
3. God/Goddess like
He/she is so Osa!
via giphy
by Naija gal March 14, 2017
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7
An underpaid employee of a large corporation. They do more than their superiors, and have broader knowledge of the technical side of things. Unappreciated.
Buyer: "I don't know how to figure this out, guess I'll have to ask the OSA"

OSA: "They pay you how much to know nothing?"
by Willhelm October 23, 2006
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