My start is part of something you may slip inside a sock
My middle is infernal and you may wish to block
My ending denotes someone with a speciality
My whole describes the writer of this dreadful poetry.
What am I?
A few people have got hung up on the word describing ME as the writer and seem to be Googling my nickname... the answer doesn't require any knowledge of my good self other than what is written in this poem.
The first line is indeed referring to part of a foot, not another word for a foot.
Shakespeare it ain't!