what is C.J. Stryver referred to as in chapter 5?

It had once been noted at the Bar, that while Mr. Stryver was a glib man, and an unscrupulous, and a ready, and a bold, he had not that faculty of extracting the essence from a heap of statements, which is among the most striking and necessary of the advocate’s accomplishments. But, a remarkable improvement came upon him as to this. The more business he got, the greater his power seemed to grow of getting at its pith and marrow; and however late at night he sat carousing with Sydney Carton, he always had his points at his fingers’ ends in the morning.

He's kind of known for being a hard working drunk.

This is bothering me a bit........... you're asking what he is referred to as....... Sydney Carton is referred to as a "jackal" in this chapter. This is where the chapter's title comes from.