Etymology: reference to the group-think mentality of members of the mormon church similar to the group-mind of the Borg Collective from Paramount's Star Trek series. Both the Borg and the Morg are collectives attempting to conquer (baptise in the case of the morg) and assimilate every culture they come in contact with.
A 'gagger' or 'honker'
Y: 'I don't know dude, there's a lot left'
X: 'Stop being a pussy - scratch us up a couple of Morg's'