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
Urh	-	Slovene
Elin	['elin]
CornÉLio	-	Portuguese
Kalyani	-	Hinduism, Indian, Telugu, Marathi, Hindi
Saleh	-	Arabic
KarolÍNa	-	Czech