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
Susannah	-	Biblical
Magnhild	-	Norwegian
Merry	['meri]
AnĐEla	-	Croatian, Serbian
Ante (1)	-	Croatian
Shamgar	SHAM-gahr (English)	Biblical