turtle
n.— «A sewer is a slippery workplace. Water can move at the speed of oncoming traffic, even when it is not laden with tree branches, two-by-fours and the waste products known in the business as “turtles.”» —“Working in the Sewers Is a Dirty Job, but Someone’s Got to Win” by Ellen Barry New York Times May 9, 2007. (source: Double-Tongued Dictionary)
Further reading
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The new Downton Abbey movie is a luscious treat for fans of the public-television period piece, but how accurate is the script when it comes to the vocabulary of the early 20th century? It may be jarring to hear the word swag, but it was already at...