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 01, 2017
Opa is a word used by people from the Balkan countries (Greece, Bosnia-Herzegovina, Serbia, Crotia etc.) to express great joy over something.
by Jugoslav May 23, 2011
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
by Junkee September 14, 2013
by spidermannnnnnn November 19, 2010
#1: OMG ugh my grandma is so annoying
#2:dude call the OPAS
#1:the what?
#2:old people assassination squad
#1:O.O
#2:dude call the OPAS
#1:the what?
#2:old people assassination squad
#1:O.O
by Me. . . . May 16, 2010