A mungmaster is required to perform what is considered the most skillful, disgusting and deadly acts munging. To become a mung master one must have been directly involved in a mung baptism and have served aboard a mungtrain. Only a mungmaster can become a mungtrain driver.
Gary's battered corpse could only be munged by a highly skilled mungmaster.
Someone or something that bites your ankles.
To a postman, an ankle biter is often known as a dog.
To an adult, an ankle biter may be a toddler.
To hikers, an ankle biter is sometimes a tick.
And so on.