elephant hunting
n.— «One strategy particularly at risk is “elephant hunting,” as it is known on Wall Street, or the megabuyout of large publicly traded companies worth tens of billions of dollars.» —“Buyout firms adjust for less debt, smaller deals” by Jeffrey Goldfarb, Michael Flaherty SignOnSanDiego.com (San Diego, California) Aug. 3, 2007. (source: Double-Tongued Dictionary)