Alliterator Animal Sh*t List: The Letter 'M'

I know you've all been patiently awaiting today's entry. I've also been. I think I promised before that the M's were very good. I hope they don't disappoint. Not that anything in a list such as this could be disappointing. But enough with my meandering mumblings and out with it:
Massive Mound of Musty Moose Manure