Word familyadjectivemouthablemouthlessmouthymouthwateringnounmouthermouthfulmouthbreathermouthbreedermouthfeelmouth organmouthpartsmouthpiecemouthwashmouth
mouth·y /ˈmaʊθi/adjectiveadj informal
someone who is mouthy talks a lot and says what they think even if it is rude 夸夸其谈的，口无遮拦的
Examples from the Corpus
mouthy• a mouthy 13-year-old girl• I was mouthy but that was about it.• Like when he'd pushed that mouthy girl under the Whirli Go Round.