The noises that sound somewhat like english that one might hear coming out of a black person's mouth. The white population may have trouble understanding coon babble and may need a translator in order to understand the language and the incompetence of its users. Also see Ebonics
Example: Mr. smith decided to take his class into the inner city to study the extreme poverty and primitive nature of the species that live there. Upon arrival a darky approaches the class.
Darky: "ay ay dogg Lemme get summa dat dro u smell me?"
Mr. Smith: "Look class! One of the local niggers is attempting to converse with us! I wonder what he's saying?!"
Student: "My daddy Says if one of those things talks to you its called coon babble Mr. Smith, its a secret language that they have obained by fucking off in school"
Mr. Smith: "Well said fine lad, you get an A+"