Lyric discussion by BrutalBart 

Cover art for Witches in the Water lyrics by Luke Haines, Cathal Coughlan & Andrew Meuller

Context for this song is provided by the track "Scroll 4" (http://www.songmeanings.net/songs/view/3530822107859459925/), although I still can't make much sense of the song.

"Long pig" is the name given, in various South Sea isles, to human flesh prepared for consumption.

Song Meaning