I call my dutch grandfather 'Opa' because he doesn't like being called anything else.
by bunnygoesboom June 22, 2005
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A Word Used To Describe Excitement at a joyous event.
"It's A Boy!" "Opa!Cigars For All!"

"Would You Like To Make-Out In The Back Of My Camaro?" "OPA!"
by Mat H. February 28, 2006
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A word Greeks scream when they smash plates
*crash* OPA!!!!
by Area 51.0 March 5, 2017
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Outer Planets Alliance. Loose coalition of citizens of the asteroid belt, and outer planetary moons ("belters") from the books and TV series of The Expanse. They tow the line between fledgling government and terrorist organization.
There's OPA and then there's OPA.
by Shaytan January 1, 2017
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Opa is a word used by people from the Balkan countries (Greece, Bosnia-Herzegovina, Serbia, Crotia etc.) to express great joy over something.
"- This party kicks ass

- It sure does! C'mon now, opa!!!"
by Jugoslav May 23, 2011
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A song that had the potential to be really good but is an over played ass song (OPAS) so people only like it for a week
Person 1:Yo you heard that song that goes lemme seeya wop wop wop

Person 2:Man thats such an OPAS
by Junkee September 14, 2013
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Greek for, "Oh my God! Your cheese is on fire!"

Cried out in Greek restaurants every time the saganaki (flaming cheese appetizer) is ignited at someone's table.
The server lit the saganaki and shouted, "Opa!" along with everyone at the table.
by TinLizzy March 30, 2009
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