The guy who headed the project that created the world's first nuclear weapon. He is known as "the father of the atomic bomb", and is famous for heralding the beginning of the atomic age with a quote from the Bhagavad Gita: "Now, I am become death, the destroyer of worlds."
William Laurence to Oppenheimer after the Trinity test: "Now we are all sons of bitches."
by AnaphylaxisMan April 8, 2011
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A fantastic indie pop/electronica band from Belfast made up of two of the coolest guys ever: Shaun Robinson (lead vocals/drums) and Rocky O'Reilly (guitar (left handed, to further add to his awesomeness), synth, and backup vocals). They made their big US breakthrough when touring with They Might Be Giants. They rock hardcore, so check them out.
Person 1: Have you heard of Oppenheimer?
Person 2: You mean that guy who invented the H-Bomb in the '50s?
Person 1: Yeah, him!

Bob: So you've heard of Oppenheimer, I'm sure?
Frank: Of course, they're so good, I'm gonna tell everyone about them!
Bob: Good idea! Let's get started!

the world would be a better place if there were more people like Bob and Frank in it.

by trillian42 February 6, 2009
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A village with a very weird name. Most likely a cult but we’ll never know due to the fact residents there partake in the annual Cousin-Dick Sucking Competition that takes place once a year and Up The Ass Day, where you can stick just about anything up there.
Oppenheim, Ny sounds like a nice place to live!
by Yoyoyoyoyoyo666 December 14, 2021
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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.
by my 69th tacos lyonnais April 15, 2022
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An individual known for having large tittays && raging parties for the fab.
Person 1: What did you guys do last night?
Person 2: Blacked out at Christine Oppenheim's.
by Fab85 May 28, 2009
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writer and one of the most amazing cat mommy in the world.
She’s very kind and sweet.
I love her sense of humor.
“Oh my god, that’s Meaghan Oppenheimer!”
You are right, should I show her pics of my cats???”
by Annie-C May 10, 2020
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Slang for for using a Nuclear weapon, named after Dr. Robert Oppenheimer, known as father of the Atomic Bomb for his work on the Manhattan project.
Nebraska needs to be fitted for an Oppenheimer Bitch Slap.

"Kim Jong Un just threatened to give the US an Oppenheimer Bitch Slap"
"Whatever that dude is too short to reach the Red Button."
by Teddy Goalsevelt March 28, 2013
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