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
Valerian	və-LIR-ee-ən (English)	History, Russian, Ukrainian, Georgian, Romanian
Armas	AHR-mahs	Finnish
RosalÍA	-	Spanish, Galician
Apolinary	ah-paw-lee-NAH-ri	Polish
Suresha	-	Hinduism
Lilou	lee-LOO	French