Yes, the word for nonstop talking is "logorrhea." Logorrhea is a term used to describe excessive or incoherent talkativeness. It often refers to a rapid, continuous, and sometimes uncontrollable flow of speech, which may or may not make sense to others. It can be a symptom of certain medical or psychological conditions, such as mania, anxiety, or some neurological disorders. In everyday language, people might also use terms like "chatterbox" or "motor-mouth" to describe someone who talks excessively.