rolling thunder
n.β Β«Rolling Thunder. We donβt need Michael Fish to explain this one: a poll of, say, a constant 1,000, but each day knocking off a set number and replacing them with newcomers, to give continuity while freshening things up. Critics say Rolling Thunder wrongly boosted John Kerry.Β» ββBreaking the code” Guardian (U.K.) Apr. 11, 2005. (source: Double-Tongued Dictionary)