According to "The Rolling Stone Illustrated History of Rock & Roll", "in Jamaican slang, "dub" is exactly equivalent to "fuck."" Dubbing originally refered to the practice of talking or chanting, with a heavy bass beat in the background. It was refered to as "dubbing" because a lot of the talking was "dirty".

Literally translated, that not only makes your average sound manual a hell of a lot funnier than it was to begin with, but it makes for two categories of imported foreign movies: the sub-titled version, and the fucked version.

I couldn't agree more...