1. Unprovable hypothesis that since galaxies and galactic clusters don't have enough mass to produce enough gravity to spin the way they do, that there thus must be invisible matter hiding that's making it all work.

2. The observation of the universe sometimes fails to follow the known laws of physics, so instead of theorizing that there must be more laws we've yet to discover, scientists have instead decided to push forward the idea that invisible masses must exist, and thus explain away the discrepancies and gaps in our knowledge.

3. Science akin to religion in that nothing at all proves it, but lots of people believe it because it explains something that was hitherto before difficult to understand.

4. Theory regarding matter and gravity that seems to make sense of Newtonian physics when it fails us, but in doing so introduces a concept that is completely ludicrous.

5. Alternative hypothesis to how the universe works to the much more logical MOND theory, or variations thereof.

6. An example of lazy science.

7. The greatest example of how extremely intelligent people can at times be completely clueless, lacking in all common sense.
I don't understand this crap, makes my head hurt, there must be Dark Matter, or something.

That astrophysicist over there, he can't understand how shit works so he's decided he's gonna pull some old bullshit theory out his ass and see if he can prove its true. He calls it Dark Matter cause its like all invisible 'n shit.

Aliens beamed me up yo, just sos they could like laugh at all a us for this Dark Matter bullshit.

I'm done with reason, from now on I believe in Big Foot, Vampires, honest politicians, and Dark Matter yo!
by Rsenal March 9, 2011
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1. a type of matter that cant be proven
2. a badass new Syfy TV show from the producers & writers of the Stargate TV shows.
1. dark matter cant be proven
2. Hey man lets watch some Dark Matter.
by Gaterbrowncoat117 October 5, 2015
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Most commonly known known as the Call of duty master camo in most recently Call of Duty Cold War

Also known for its cards in NBA 2k, as rarest card in the game.
Or its known for the thingy in space that no one cares about.
YO YOU GOT DARK MATTER? NO WAY THAT'S LIKE SO HARD TO GET
by TEACHERS WEIRD WORDS May 2, 2022
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The dark skin near/on your genitals, usually starts at the juncture of the leg and crotch area.
Someone with baggy shorts is climbing a ladder above you, you look up and see their dark matter.

Some chick with short shorts is stretching her legs in a split, you see her dark matter.
by Reichull August 20, 2011
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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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to take a dump so large that people feel the weight of it dropping for miles around.
Hand me the matches and a magazine...I have to go create dark matter.
by awfulbridesmaid December 3, 2010
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