We know that a noun phrase contains at least a noun or a pronoun and for the most part, these phrases can be replaced by a pronoun.
Ex: "We spoke to [the old guy that lives in the little shed on the last farm to the left.]
I made that example long just to illustrate the potential of a noun phrase.
But what about this?
I already spoke to [the good-for-nothing slob.]
Is "good for nothing" modifying slob as an adjective?
If so, is the entire phrase an adjectival phrase within a noun phrase?