Fecal matter "packed" in and around the anus preventing other matter from passing. There are various ways to remove a mudpack. The two most
popular are as follows:
1. Melting the mudpack: If your mudpack is all dried up and
crusty, simply use a lighter or a strike anywhere match to melt it away. Beware of the drip!!
2. Icepick & hammer: This is
pretty self-explanatory. Simply chisel away the shitty goodness!
Surgeon General's Warning: When melting a serious mudpack, use caution because dingleberries are extremely flammable.