Answer: motormouth

AnswerCrossword Clue
MOTORMOUTH

Chatterbox

MOTORMOUTH

Constant talker

MOTORMOUTH

Incessant talker

MOTORMOUTH
Nonstop talker
MOTORMOUTH
Talkative one, slangily
MOTORMOUTHTalkative student
MOTORMOUTHTalker who won't stop
MOTORMOUTHFast-talker's malady?
MOTORMOUTHUsed-car salesman?