Big Cubes edge pairing
From Speedsolving.com Wiki
Big Cubes Edge Pairing is the edge pairing method for the 5x5 and bigger cubes, popularized by BIGcubes.com. Together with AvG Edge Pairing, it is the main edge pairing method for 5x5. For bigger cubes, Big Cubes edge pairing is by far the most popular method among top cubers.