A person with an explosive temper who goes off like a bomb,the sun;where nuclear fission or fusion takes place;A thespian who enjoys playing Einstein or Robert Oppenheimer more then just once in his acting career>
Was Sam Jaffe a NUCLEAR REACTOR or did he ever play Dr. Albert Einstein in his acting career?
by john adams November 13, 2003
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A reactor that runs on dark matter, usually started up via power laser ignition to expand dark matter in the center of the reactor superstructure. Currently handled inside of Quantum Science Multipurpose Labs. Although, it is currently undergoing a switch of companies from Quantum Science to Pinewood Builders.
John: Hey Bill, have you seen the Dark Matter Reactor ignition sequence?
Bill: No... did you get a recording of it?
John: HELL YEAH!
by TechnoDiamond October 12, 2018
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Metal balls middle of four pew pew things lol
Dark matter reactor go brr when meltdown
by HmmmYouDontKnowIt August 31, 2021
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A Person who over reacts to everything
I told Brian I can't go to the movies with him, now he thinks I'm pissed at him, he's such a Nuclear Over-reactor!
by ccplaya December 31, 2016
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Being hit with a taser then being given a wedgie.
doubleviking.com has a video of one. search girl with big mouth nuclear reactor.
by Tristan Vongkultrup January 16, 2008
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Describing a vain, last-ditch effort to resolve a hopeless problem, often borne out of desperation. The measure normally has little to no chance of preventing an adverse result, and is often little more than a token display of action by the responsible party.

Refers to the effort by authorities to use sea water to flood damaged reactors at the Fukushima Nuclear plant in March 2011. Although no viable options presented themselves in the face of impending meltdown, the gambit to use sea water had little chance of success and in fact ran the risk of producing flammabile hydrogren as a byproduct.
From fifty five yards out and with the wind in their face, the team's decision to kick a last minute field goal was little more than sea water in the reactor.

When the near-bankrupt company tried to find a buyer for its worthless assets, almost all observers saw the move as being no better than running sea water through the reactor, and that insolvency was unavoidable.
by hammertime0101 March 15, 2011
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Has little to no relation to one would actually think it means. In reality it is a term used when one is excited but doesn't know how to express their excitement. Commonly used as a fill in for "hooray" or "yes!"
You have just been awarded sexiest human being ever, what do you have to say for yourself?

"Start the Reactor!"
by C-Wild February 19, 2009
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