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
Hartmut	HAHRT-moot (German)	German, Ancient Germanic
Alfonso
ThorbjÖRn	-	Swedish
Yuri (2)	yoo-ṙee	Japanese
Leontios	-	Ancient Greek
Meggy	-	Medieval English