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
Preben	-	Danish, Norwegian
&Aelig;Thelfl&Aelig;D	-	Anglo-Saxon
ŞErİFe	-	Turkish
Devraj	-	Indian, Hindi
Ruaridh	-	Scottish
Rastus	RAS-təs	English (Rare)