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
Orsino	-	Italian
Jolly	['dʒɔli]
Galal	-	Arabic
Annabel	AN-ə-bel (English)	English, Dutch
Nikodem	nee-KAW-dem	Polish
Tutku	-	Turkish