This string can be broken down into a few different technical parts:
These are the audio channels . It suggests the file includes both a 5.1 surround sound track and a 2.0 stereo track.
Since this looks like a snippet from a larger list or a specific download link,
The phrase you provided looks like a typically used for high-definition digital movies. It likely refers to a specific "rip" or copy of the 2005 film Lord of War .
