water buffalo
n.— «Other times foundations fracture and wells crack, the water draining away. “Water buffalo”—the local term for replacement water tanks wrapped in white insulation—graze in backyards and side lots.» —“In The Black” by Jane M. Von Bergen in Waynesburg Philadelphia Inquirer (Pennsylvania) May 11, 2008. (source: Double-Tongued Dictionary)
Further reading
If you alternate alcoholic beverages with glasses of water over the course of an evening, you’re said to be zebra striping. This bit of slang was inspired by how the animal’s alternating black-and-white markings are like the contrast between the...
You might be surprised to learn that a “hoosier” isn’t necessarily from Indiana. Around the St. Louis, Missouri, area, the term hoosier has a whole other meaning. And: Scotland is the home of the Golden Spurtle world championship, but what exactly...
I don’t know if your American readers are aware of it, but there’s an actual, literal water buffalo, defined by Merriam-Webster as “an often domesticated Asian buffalo.” The Philippine carabao (kalabaw in Tagalog and karabaw in Visayan, another Philippine language) is a water buffalo.
water buffalo (n)
1. a small two wheel trailer used by US Army and Air Force to transport potable water to troops in the field
2. Colorado has arcane water laws with the chief tenet being ‘first user has first right.’ A long-time expert lawyer in this field of law is nick-named a ‘water buffalo’.
Who coined the term and when.
This water trailer is far from the looks of a buffalo. I think it looks more like a pig.