know what are talking about

know what you are talking about

to speak in an informed way because of your experience or education He doesn't know what he's talking about. He's never even been to Alaska.

Name	Pronounced	Usage
Iisakki	EE:-sahk-kee	Finnish
Bilyana	-	Bulgarian
Tawnie	TAW-nee	English (Rare)
ÉDith	e-DEET	French
Francka	-	Slovene
Nikolas	-	Greek, English