"Mop" in Caldonia (UNCLASSIFIED)

[Mullins, Bill AMRDEC]

Classification: UNCLASSIFIED
Caveats: NONE

In the song "Caldonia", in some versions, the lyrics go:  "What makes
your big head so hard"? and the audience responds "MOP!"

What does "mop" mean?

This:

http://www.newsfromme.com/archives/2009_05_20.html#017150


is the origin of the question.
Classification: UNCLASSIFIED
Caveats: NONE

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