Space Cadet
WordNet

noun


(1)   Someone who seems unable to respond appropriately to reality (as if under the influence of some narcotic drug)
WiktionaryText

Noun



  1. One who deals with reality in a way consistent with being under the influence of (or "spaced out on") drugs.
  2. One who forgets, daydreams, or otherwise is distracted from reality more often than most.
 
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