1) Airhead 2) American graphic novel 3) Ditsy individual 4) Ditzy one 5) Flake 6) Flighty type 7) La-La Land resident 8) One in la-la land 9) One out in la la land 10) Plebe on Mars 11) Science fiction comic 12) Vacuous one 
Space Cadet is a 1948 science fiction novel by Robert A. Heinlein about Matt Dodson, who joins the Space Patrol to help preserve peace in the Solar System. The story translates the standard military academy story into outer space: a boy from Iowa goes to officer school, sees action and adventure, shoulders responsibilities far beyond his experienc...
Space cadet is slang for a person who is or appears to be habitually intoxicated through taking drugs.
[n] - someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug)
slang for a person who is or appears to be habitually intoxicated through taking drugs.
noun someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug)