To have been beaten without mercy into a state of
retardation.
The 'Mong' part is derived from Mongoloid or Mongolism and refers to general
retardation and the
second part comes from the verb 'Fong' meaning to beat mercilessly.
Television report on a tragic accident:
"The
police officer on
the motorbike swerved to avoid a
pedestrian who stepped onto the road, he then struck the side of a bus before cascading into a lamppost causing a severe and permanant brain injury."
Carlow youth:
"Yea he was mongfongled!!!"