>[..] an enormous “fatberg” was discovered in the sewers under London. A hellish fifteen-ton lump of cooking fat, congealed with diapers, wet wipes, sanitary towels, and condoms. In videos taken by sewer workers the thing crawls over the walls and ceilings of the grand Victorian drain, its tendrils puffing out from the monumental central mass. A mound of fat the size of a London bus, glistening death-pale in the torchlight; fungal, a saprophage, its terrible bulk blocking off the normal hygienic flows of piss and shit. It took three weeks for the utility company Thames Water to fully repair the drains.

https://thebaffler.com/the-horrordome/the-fatberg-returns