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
Olwyn	-	Welsh
Beste	-	Turkish
Ludis	-	Latvian
Hristina	-	Bulgarian, Macedonian, Serbian
LÉO	le-O	French
Denis	de-NEE (French), DEN-is (English), DE-nis (German)	French, Russian, English, German, Czech, Slovak, Slovene, Romanian, Croatian