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Stands for Old Man Sex Appeal.

1. An older man who has high sexual attraction.

2. Its a gauge women measure in their own mind when considering sleeping with and or admiring the sexual attractiveness an older man. Usually this gauge which is called the OMSA Meter is blindly boosted by how much money, power or fame this older man has. Do not mistake this for a sugar daddy as a poor older man can possibly have high OMSA.

For an older man to qualify for OMSA the woman who is measuring it with her OMSA meter has to be at least 10 years older than her.

Women that have unusual low standards of giving any man OMSA on their OMSA meter usually have daddy issues.
Example 1:

Girl 1: "I'm thinking of going out with a date with my boss at work. He's older than me."

Girl 2: "Does he have OMSA?"

Girl 1: "Yep sure does. He is on Johnny Depps level"

Example 2.

Girl: "Girl what the hell are you doing fooling around with that old fool, is your OMSA meter working properly?"
OMSA by SaidInJest February 23, 2009
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A word used to describe a person or thing that is unusually attractive.
Wow! My new science teacher is omsa.
Omsa by wick-cheese-432 September 9, 2021
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Oh My Science And Reason. What atheists scream when they're having sex.
Ben... Ben... BEN! OMSAR!
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What you call someone who has been destroyed in a distrack.
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A filipino and english word combination. /oms/ and /same/

This means that you are agreeing to a feeling or statement by someone and you are also feeling it. You can use /omsame/ instead of using the whole "i feel you" statement.
Friend: Do you know the feeling that you want to disintegrate sometimes?
You: omsame
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A GLOBAL HOE WITH MANY BODIES TO HER NAME
OMSARI by om sari October 13, 2023