A term used for something that is so fucked up, that it is figurably able of giving you cancer.

Can be used as both an adverb and adjective.
Jake: Look at this gore I found the other day. It's fucking amazing.
Brad: That's some cancerous shit. Sometimes I don't know why I still am friends with you.
by Nick32x December 20, 2014
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A cruel, heartless, monstrous, uncaring disease that doesn't discriminate when choosing a victim. A disease that brings anguish and heartbreak to people and families who don't deserve it, and is known to cruelly take away those that people love and care about. Those who have and battle cancer are among the bravest individuals on the planet, and they should be considered heroes for the sheer amount of courage and intestinal fortitude they display.
My friend was diagnosed with cancer recently, I'm praying that he'll be able to beat it
by Metallicajunkie October 4, 2018
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Besides the obvious, a term to describe something unliked.
Hey you like Fortnite?

Naw, that game is Cancer
by Small Xanax April 3, 2018
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One disease to rule them all. Anything and everything causes cancer nowadays, which is somewhat depressing. There is no true cure for any form of cancer, but there just might be if the human race would stop warring with itself and concentrate on destroying diseases instead.
My God! Jimmy! Stay away from the sun! It causes CANCER! My God! Jimmy! Don't eat that! It causes CANCER! MY God! Jimmy! Don't breathe in school! IT CAUSES CANCER!
by The Smexorcist April 24, 2005
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The zodiac sign cancer, the crab, is a water sign. The birthday range for this sign is June 21 - July 22.
Cancers are often associated with being emotional, sensitive, quiet, good behaved, humorous, fun-loving, understading, loving, nurturing, empathetic, a bit awkward, caring, and a bit quirky.

Cancers usually have a hard time coming out of their comfort zone. They are typically very shy at first, but as time goes on and they start opening up to you, you will learn that they are actually very fun-loving and a bit hyper

When it comes to friendships, cancers would rather have a small very close group of friends vs. a large group of friends. Not only are they typically introverted, but cancers value very close friendships and is easier for them to manage them.

Cancers are very sweet and caring in romantic relationships, they are loving, always thinking of the other person, nurturing, understanding, and always wants the best for their significant other.
Cancers can also be very protective and wants to keep the other to themselves, (not in a controlling way) and may even get jealous at times

Usually cancers enjoy a more vanilla relationship, but do not mind being sexual with their s.o. and enjoy those moments as well.

Cancers often hide their feelings. They love there friends and family, but may push them away or lie to them and tell them that they are fine. Usually they will only tell an extremely close friend or a significant other, but it may not come out imidently.
My zodiac sign is cancer.
She seems like a cancer.
by Bear1233 August 14, 2017
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Someone that's radiating with stupidity
Johnny is so cancerous that almost every one hates him.
by Beastmode1386 October 28, 2017
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