waterfall
n.— «Lawmakers use the term “waterfall” to describe surplus revenue. Hube worried there might be no water in this year’s waterfall.» —“House acts on spending, tax rates and fees” by Nancy Remsen in Montpelier Burlington Free Press (Vermont) Feb. 19, 2007. (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...
John in Tucson, Arizona, remembers his grandfather from Sharon, Vermont, saying possessives such as hisn, hern, yourn, and ourn, as in Those cattle are hisn or That house is hern. These archaic forms go back to Middle English, shaped by analogy with...