dark fiber 

Fiber-optic cables that have been laid but aren't yet in use

Anyone else concerned how Google is buying up all the dark fiber?

dark fiber by Washed Heathen September 11, 2005

Dark Fiber 

The large quantity of information, time, and effort wasted in large bureaucratic organizations to fulfill petty changes that will likely never come into use.

The dark fiber at Advance Auto Parts cost the company millions in capital per year.

Dark Fiber by emptypepsican August 17, 2008

dark fiery 

A group of teenagers running around like psychos, and you should probably avoid them for your sanity's sake.

"Who in the hell decided to gang rape a goddamn turtle!?"
"Dark fiery."

dark fiery by Ms. Kim Taehyung January 25, 2018