be on another planet



be (living) on another planet

  (informal)
if you say that someone is on another planet, you mean they do not notice what is happening around them and behave differently from other people He doesn't always make much sense. It's like he's on another planet half the time. (informal)
See also: another, on, planet

Common Names:

NameGenderPronouncedUsage
Auden['ɔ:dn]
Gabinogah-BEE-noSpanish
RaymundRAY-məndEnglish (Rare)
JubalJOO-bəl (English)Biblical
UrsulaUR-sə-lə (English), UR-syə-lə (English), OOR-soo-lah (Finnish)English, Swedish, Norwegian, Danish, German, Dutch, Finnish, Late Roman
ErskineUR-skienScottish, Irish, English (Rare)