Babble

18 clues
Prate
Chatter
Gibberish
Go on and on
Psycho talk?
Talk nonsense
Talk on and on
Speak nonsense
Fail to shut up
Speak gibberish
Talk like a baby
Indistinct speech
Talk incoherently
Talk nonsensically
Talk (like a brook?)
Blah blah blah blah blah
Say blah blah blah blah blah
Chatter without intelligence?