What Does It Mean?

You are correct!

From our dictionary:

po•lem•ic

(pu•lem'ik, pO-),
n.
1. a controversial argument, as one against some opinion, doctrine, etc.
2. a person who argues in opposition to another; controversialist.

adj.
Also,po•lem'i•cal.of or pertaining to a polemic; controversial.