Space cadet

noun, slang

Definitions

Noun
  1. 1
    A person in training to be a (generally military) astronaut.
  2. 2
    someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug) wordnet
  3. 3
    One who deals with reality in a way consistent with being under the influence of (or "spaced out on") drugs. derogatory, slang
  4. 4
    One who forgets, daydreams, or otherwise is distracted from reality more often than most. derogatory, slang

Etymology

From the title of the 1948 science fiction novel Space Cadet, by Robert A. Heinlein.

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