talk through one’s hat

in. to say baseless things; to speak carelessly and tell lies. You don’t know what you are talking about. You’re just talking through your hat.

Name	Pronounced	Usage
Kilian	KEE-lee-ahn (German)	German, Irish, French
Gaiana	-	Ancient Greek (Latinized)
VÂN	-	Vietnamese
TuyẾN	-	Vietnamese
LlorenÇ	-	Catalan
Patrik	-	Swedish, Czech, Slovak, Croatian, Hungarian