Alternative version of "hung like a horse," or to have a large penis. A reference to viking days - Norse vikings were legendary for the size of their endowment.
as she made sweet love to vladimir the viking, she remarked that he was hung like a norse
to have an enormous penis. this is the original definition from the age when Norsemen invaded England and raped and pillaged. they were said to have enormous penii. This has become corrupted to the modern hung like a horse
"quick lads" said Alan "get out of the bath, here comes Jermayne and he's hung like a Norse."