mouthy
[adjective]
Synonyms: talkative, babblative, gabby, garrulous, loose-lipped, loose-tongued, loquacious, multiloquent, talky, tonguey, rhetorical, bombastic, declamatory, euphuistic, florid, flowery, high-flown, oratorical, overblown, pompous

[TahlilGaran] English Synonym Dictionary ▲

mouth‧y /ˈmaʊθi/ adjective informal
someone who is mouthy talks a lot and says what they think even if it is rude

[TahlilGaran] Dictionary of Contemporary English ▲