space cadet
US /ˈspeɪs ˌkæd.ət/
UK /ˈspeɪs ˌkæd.ət/

1.
orang yang pelik, pelamun
a person who is out of touch with reality, often appearing dreamy, distracted, or eccentric
:
•
He's such a space cadet, always daydreaming during meetings.
Dia memang orang yang pelik, selalu berkhayal semasa mesyuarat.
•
Sometimes I feel like a space cadet when I forget simple things.
Kadang-kadang saya rasa seperti orang yang pelik apabila saya melupakan perkara-perkara mudah.