Loquacious
Adjective
Very Talkative
Synonyms: Gabby, Chirpy
Antonyms: Quiet, shy
The loquacious Nurse from Romeo and Juliet explained things in so much detail and drama that most of her major lines are monologues!
She was quiet in front of adults but around her friends she is so loquacious you can hardly get her to shut up.
Rory: "Man am I wired!"