noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A large accumulation of fat and discarded toiletries which clogs sewers.

   "Months ago a tunnel was clogged with a fatberg. It took a team of workers a month to move it."

Example

More examples

"There's a big fatberg clogging up the sewer."

Etymology

From fat + berg, modelled on iceberg. By surface analysis, fat + -berg.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.