fatberg

[ fat-burg ]

noun

1. a solid lump in a sewer system consisting of waste that does not break down, as congealed cooking fat, cleansing wipes, and cotton balls:

   Cities must deal with the growing problem of large and small fatbergs that cause sewage backups and street flooding.

Word History and Origins

Origin of fatberg¹

First recorded in 2000–05; fat ( def ) (in the sense “greasy substance”) + (ice)berg ( def )