unreal
adj.
c.1600, "not real," from un-(1) "not" + real, adj.. Meaning "impractical, visionary" is by 1660s. Slang sense of "wonderful, great" is first recorded 1965.
Unreal City,
Under the brown fog of a winter dawn,
A crowd flowed over London Bridge, so many,
I had not thought death had undone so many.[Eliot, "The Waste Land," 1922]
Under the brown fog of a winter dawn,
A crowd flowed over London Bridge, so many,
I had not thought death had undone so many.[Eliot, "The Waste Land," 1922]