Beyond the Pale

Unacceptable; outlawed.  (The Pale historically was the area of English government around Dublin.  The people who lived outside this area were regarded as uncivilized.) From NTC's English Idioms Dictionary.

The "pale" derives from paling which means fence.  Fences are erected to define boundaries.  To be "beyond the pale" implies that one is outside of defined boundaries. 

Similar to fences are walls.  In the days when walled cities were common in Europe people who behaved unacceptably were sometimes exiled or banished from the community and sent to live outside the walls. 

More particularly, the "pale" was a fence around the English controlled part of Ireland around Dublin.  Beyond the Pale was how the English referred to the badlands outside English control.   From:   Origin of Phrases

  Songs referenced: 

Doughnut Song