MEANING: adjective: Blindly or unreasonably optimistic.
noun: One who is optimistic regardless of the circumstances.

ETYMOLOGY: After Dr. Pangloss, a philosopher and tutor in Voltaire’s 1759 satire Candide. Pangloss believes that, in spite of what happens -- shipwreck, earthquake, hanging, flogging, and more -- “All is for the best in the best of all possible worlds.” The name is coined from Greek panglossia (talkativeness). Earliest documented use: 1831. The word pangloss is used in the same manner.

MANGLOSSIAN - after gender-reassignment surgery

PAN-GLOSS-MAN - the superhero who shines cooking utensils

ANGLO'S SIAN - "Jane" (from the Welsh)