fantast

 
Pronunciation: /ˈfantast/
(also phantast)

noun

archaic or North American
  • an impractical, impulsive person; a dreamer: the accusation was passed to the national press from the mouths of liars and fantasts

Origin:

late 16th century (formerly also as phantast): originally via medieval Latin from Greek phantastēs 'boaster', from phantazein or phantazesthai (see fantastic); in modern use from German Phantast