garrulous
This term carries a distinct negative connotation of rambling or triviality. While a person who is talkative might be seen as social or engaging, someone described as garrulous is often perceived as tedious or lacking a filter, frequently discussing unimportant details at length. It is typically used in social or character-descriptive contexts to highlight a lack of restraint in speech. The word evokes an image of a one-sided conversation where the speaker dominates the interaction without regard for the listener's interest or the relevance of the topic.
Meanings
Excessively talkative, especially on trivial matters.
"The garrulous neighbor spent an hour telling me about her cat's diet."
Given to talking a great deal; loquacious.
"He became increasingly garrulous after a few glasses of wine."