be (living) on another planet

slang To be oblivious to one's surroundings or act strangely. I have no idea what the professor said during today's lecture because I was on another planet the whole time. The millionaire investor always says something wacky in the board meetings—it's like he's on living another planet.

Common Names:

Name	Pronounced	Usage
Pearson	['piəsn]
Osee	-	Biblical Latin, Biblical Greek
Sonal	-	Indian, Hindi, Marathi, Gujarati
Tonya	TAHN-yə	English
Gyeong	gyung	Korean
Ithamar	-	Biblical, Biblical Latin, Biblical Greek