all in (one's) head

Not substantial or real; having been imagined or invented. I don't know why you think I don't trust you. I can assure you that it's all in your head.

Name	Pronounced	Usage
Sosimo	so-SEE-mo	Spanish
Yedidah	-	Biblical Hebrew
Renate	re-NAH-tə (German), rə-NAH-tə (Dutch)	German, Dutch, Norwegian
Upton	UP-tən	English (Rare)
Browning	['brauniŋ]
Joon-Ho	joon-ho	Korean