oppan gangnam style 

the song performed by psy, the very famous youtube hit and over 233 million views. show by lotsof celebrites and is known basically for being the korean version of LMFAO. gangnam is a rich and cultural part of seoul, south korea's capital, where they dress very colorful and fanstasy like.

Man i love oppan gangnam style, best song ever!

oppan gangnam style by dghfgshb September 21, 2012

OPPA XL

OPPA is an emote used to express frustration with something, as you can probably guess with the man smashing his keyboard
why the emote is used is in reference to XL, which is the abbreviation of Xiangling
Xiangling is usually taken as the basis for analysing how good a character is when talking about damage output and ease of use
as such, she gets mentioned so much that even mentioning her name is enough to trigger genshin players and move them to anger
so OPPA XL is basically used when XL is mentioned
the word AGANE (the incorrect spelling of again) is also used in conjunction at times as it's used to refer to her being mentioned all the time

1010: "xiangling-"
entire genshin fandom: "OPPA XL AGANE"

OPPA XL by Bacobowl July 12, 2022

JungKook Oppa 

He's not your oppa

Army: JUNGKOOK OPPA
JUNGKOOK: I aM nOt yOuR oPpA

JungKook Oppa by jhgfrfgh June 17, 2019

Oppa 

Oppa is used in Korean culture by a female to a male, who is older than her by the boundary of 10 years. Female's use this title for their older brother, older male friend, or even in a flirtatious way.

"Oppa~ You promised me yesterday that we'd go to the beach, remember?" ^-^
"Oh, right.." >///<

"JUNGKOOK OPPAAAAAAAAAAAAAAAAA!!!!!!"
"I'M NOT YOUR OPPAAAAAAAAAAAAAAAAA!!111!"

Oppa by Bubbs the trubss May 28, 2018

Oppa 

something you do not say to jeon jungkook.

you: jungkookie-oppa !!
jungkook: *smacks you* i aM NOT YOUR OPPA !

Oppa by bTsLov3r92 July 15, 2018

Oppa 

Oppa is a Korean term usually meaning an older male such as an older brother, male friend, and can also be used while Flirting
Ways people say Oppa

Oppa! Did you eat my ramen!
Oppa, what are your classes today?
Oppa, you are looking extra handsome today!

Oppa by Korean Terms August 27, 2018

oppenheimer moment 

Not to be confused with an epic gamer moment.
It is a moment of realisation of how bad of a person you are after killing literally billions of NPCs and/or committing other unbelievable atrocities in videogames.
This expression is actually referencing a famous quote of J.Robert Oppenheimer, one of the father's of US nuclear program. While describing his feelings from witnessing the first explosion of an atomic bomb, he said:

"We knew the world would not be the same. A few people laughed, a few people cried, most people were silent. I remembered the line from the Hindu scripture, the Bhagavad-Gita. Vishnu is trying to persuade the Prince that he should do his duty and to impress him takes on his multi-armed form and says, “Now, I am become Death, the destroyer of worlds.” I suppose we all thought that one way or another".

gosh this be giving me goosebumps every f-ing time.

I've stopped playing Plague Inc. after realising that I've actually killed 7 billions of people like 7 times. That was trully an oppenheimer moment.

oppenheimer moment by my 69th tacos lyonnais April 15, 2022