barge
n.— Note: Parallel to “boat” with the same slang meaning. «In trackday argot, a big, heavy but probably very powerful car is known as a “barge.” The Audi RS6 is not only the most powerful production Audi ever, but also the most powerful estate car in the world (a saloon version will be available soon). Enter Superbarge. Yours for £77,625.» —“Superbarge: Audi RS6 Quattro” by Peter Dron Telegraph (United Kingdom) Feb. 9, 2008. (source: Double-Tongued Dictionary)