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
Keturah	ki-TOOR-ə (English), kee-TYOOR-ə (English)	Biblical
Cyril	['siril]
Harper	HAHR-pər	English
Lotte	LAW-tə (German)	Danish, Swedish, Norwegian, Dutch, German
Fearghal	-	Irish
Jaroslava	-	Czech, Slovak