cancer

A disease in which the cells of a tissue undergo uncontrolled (and often rapid) proliferation.

If successful, Edison and Ford—in 1914—would move society away from the[…]hazards of gasoline cars: air and water pollution, noise and noxiousness, constant coughing and the undeniable rise in cancers caused by smoke exhaust particulates.

Risk is everywhere. From tabloid headlines insisting that coffee causes cancer (yesterday, of course, it cured it) to stern government warnings about alcohol and driving, the world is teeming with goblins. For each one there is a frighteningly precise measurement of just how likely it is to jump from the shadows and get you.

Something damaging that spreads throughout something else.

The disease of the self runs through my blood; It's a cancer fatal to my soul.

Sierra Leone's post-dictator problems are almost absurd in their breadth. It once exported rice; now it can't feed itself. The life span of the average citizen is 39, the shortest in Africa. Unemployment stands at 87 percent and tuberculosis is spreading out of control. Corruption, brazen and ubiquitous, is a cancer on the economy.

Extremely unpleasant and annoying.

I used to love this game, but the new meta is straight up cancer.

A constellation of the zodiac traditionally figured in the shape of a crab.

And add more coals to Cancer when he burns / With entertaining great Hyperion.

Cancer was occupied by a scarab in Egypt, so the general shape of animal may have been suggested by Praesepe.

The zodiac sign for the crab, ruled by the Moon and covering June 22–July 22 (tropical astrology) or July 16–August 15 (sidereal astrology).