Opa 

“Opa” is a Bulgarian word used when you have done something wrong by accident.

Opa! I stepped on someone’s foot.

Opa by Madlen111310 June 26, 2019

opa 

used as a slang term for a retard

stop being such an opa hannah.

opa by filmer101 May 25, 2011

Opa 

something to say when you see a bellydancer at a restaurant; normally followed by the act of flinging loads of cash at her.

"I love this restaurant honey, it's so romantic...."

"only the best for you on our anniversary, WHOA, OPA OPA OPA!!!!!!!!, sorry honey, I got distracted, where was I?"

Opa by MintyLeila---not an Armenian person, but has Armenian friends-I love glendale! July 15, 2005

Opa 

Verb: The act of violently inserting two or more fingers into another persons anus and exclaiming OPA!

Person 1: *Bends over to tie shoelaces*
Person 2: *Identifies an exposed anus and shoves two fingers into Person 1's anus* OPA!

Opa by HolmenOpa April 19, 2015

opa 

holla

yo those sneakers is hot. OPA!

opa by amanda August 17, 2003

opa 

Swedish Counter-Strike clan founded in 2001

opa by SpinTac October 12, 2003

OPA 

one party animal; used as a greeting to call the Army of Skanks

When a skank sees a fellow skank respond with "OPA".

OPA by KKKKCCSSJD April 1, 2007