A peculiarly Irish way of using the word Fuck. By putting "be" before "fuck" the word has a similiar meaning to "could be". I am not sure of the origin, but probably some appropriation from Irish is likely, at least in grammatical form.
"She was as roughas befucked", used to describe a particulary ugly Girl.
The state of being by which one is completely fucked over by everything that could possibly go wrong in any situation or series of consecutive situations. Extremely unlucky.