Babbler (Noun)

Any of various insectivorous Old World birds with a loud incessant song; in some classifications considered members of the family Muscicapidae.

Nouns denoting animals.

An obnoxious and foolish and loquacious talker.

Nouns denoting people.

The babbler at the party wouldn't let anyone else get a word in edgewise, dominating the conversation with his inane chatter.
My coworker is such a babbler, constantly interrupting others and spewing nonsense that no one wants to hear.
The babbler on the bus wouldn't stop talking to the stranger sitting next to him, despite the stranger's obvious disinterest.
The babbler at the meeting wasted everyone's time with his long-winded and pointless comments, causing the discussion to go off track.
The babbler at the dinner table was so annoying that everyone started to tune him out, pretending to listen while secretly rolling their eyes.