A person of earth shattering incompetence and uselesness.
An individual of brain numbing stupidity and ineptitude.
A character of such bone shaking fuckwhit'ness that the 'you are a spanner!' comment just wont do!
"a guy that parks his not that sweet of a car on the towns main street car wash and hand washes or shammies it with his shirt off, bumping his stereo system."