Originally a chidren's TV programme(BBC late sixties) about a neanderthol type person found to be living in a cave at the bottom of some childs garden Describes a dirty,scruffy or very unkempt person.
Have you seen the state of his flat, he's a right stig of the dump.
Someone who likes to try every dirty kink in existence but you really have to make that person horny to make the person 'productive' while doing alot of kinky things.
Someone who is addicted to obtaining money and building wealth. A money addict and fanatic. Breadheads often work more than one full-time job, and some even participate in illicit activities to "obtain the bread".