Which Looney Tunes character is a fast-talking rooster from the South?

The fast-talking rooster from the South is Foghorn Leghorn.

Foghorn is an anthropomorphic rooster in the Looney Tunes and Merrie Melodies cartoons. He is drawn as a large white rooster with a booming Southern accent, a habit of talking at length, and a fondness for presenting himself as an authority. His speech is deliberately bombastic, making “fast-talking” a fitting description even though his personality is often more blustering than genuinely clever.

The character first appeared in the 1946 short “Walky Talky Hawky,” which also featured Henery Hawk. Robert McKimson created and directed the Foghorn cartoons, while Mel Blanc originated the voice. Foghorn’s manner was strongly inspired by Senator Claghorn, a loud Southern radio character played by Kenny Delmar on Fred Allen’s 1940s program.

A common mix-up is confusing Foghorn with Barnyard Dawg, his frequent rival. Their recurring prank war forms the central conflict of many shorts, but Barnyard Dawg is the dog—not the rooster. Miss Prissy is a hen associated with Foghorn, and Henery Hawk is the young hawk who often tries to identify a chicken to eat.