Chatty Charlie 

Someone who won't shut up.

Chatty Cathy's self important brother.

Interchangeable with Chatty Cathy, but sometimes also implying someone who talks over people, even when the other person has something more relevant to say.

Hey Chatty Charlie, just because you won't stop talking doesn't mean we haven't figured out you've got nothing to say!

Chatty Charlie by La Regulatrice July 29, 2016

chatty charley

Asshole who talks nonstop but tells a woman she talks too much.

Did you hear him tell me to shut up!? Mother fuckin chatty charley...

chatty charley by Double standard February 24, 2014