flap (one's) jaws

To talk in a meaningless, aimless, or idle manner. Jim always starts flapping his jaws after he's had a couple of drinks.

Name	Pronounced	Usage
Ailpein	-	Scottish
Jannik	-	Danish
Corina	-	English, German, Romanian
Meagan	MEG-ən	English
Hasim	-	Arabic
Abhinav	-	Indian, Hindi, Marathi, Kannada, Telugu