decimal dust
n.— «The thin wires that could carry the world’s information system directly and cheaply to every house in the city is on the order of what Sup. Ross Mirkarimi likes to call “decimal dust.” Electrical conduit, which will one day be the backbone of a city-owned power system, costs a little more, but not that much.» —“Am I the only person who thinks this is insane?” by Tim Redmond San Francisco Bay Guardian (California) Aug. 6, 2008. (source: Double-Tongued Dictionary)