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
ĈIela	chee-E-lah	Esperanto
Christina	[kris'ti:nə]
Irmak	-	Turkish
Evangeliya	-	Bulgarian
ValdÍS	-	Ancient Scandinavian, Icelandic
Ivah	-	Biblical