fatberg
noun /ˈfætbɜːɡ/
/ˈfætbɜːrɡ/
- a very large mass of solid waste that is found in a sewer, consisting especially of fat and items that people throw down toilets
- Officials removed a 15-ton lump of wrongly flushed grease and wet wipes, dubbed the ‘fatberg’, from a London sewer.