Space Cadet definition

Space Cadet

Topics Space Cadet Definition

WordNet

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

WiktionaryText

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