a pitchfork
It comes from a couple places: early associations with various pagan gods (ie Neptune) as Christianity tried more and more aggressively to demonize them and from the idea that Satan torments the souls of the wicked and the pitchfork being a fairly uncomfortable tool of choice for most people (of course, in modern day, he would probably be depicted as hosting American Idol.. pain and terror incarnate)
As hairy
This is a late victorian/early 1900's depiction of the devil. The red suit is a reference to hell and the pitchfork comes from the demoninzation of earlier gods (ie poseidon) but also from his torturing of the damned. In this form, the devil was typically lampooned rather than being the typical object of dread and fear most people might have of Satan.
A pitchfork is a fork that was originally used to collect hay and straw from the fields. A pitchfork is not a disease
In Christian theology, Satan is commonly depicted as a fallen angel who rebelled against God. There is no widely accepted belief or scriptural basis stating that Satan was a woman. Satan is typically portrayed as a male figure in religious texts and teachings.
Colin Pitchfork was born in 1961.
Pitchfork Media was created in 1995.
The devil's pitchfork is called a trident
Pitchfork - album - was created in 1991-10.
Pitchfork Uprising happened in -1920-03.
Even if the devil really exists, no living person has ever seen him. So, there is no reason to say that the devil has a tail, horns or pitchfork. These are just part of the imagery to make the devil seem terrifying, along with tales of hellfire.