Meaning

adjective conspicuously or grossly unconventional or unusual

originCoined in 1971 by Boston Globe editor Bill Cardoso. Of uncertain origin; OED proposes Italian gonzo (“dolt”) and / or Spanish ganso (“dolt, goose”). The etymology supplied by Cardoso himself (French gonzeaux) is spurious; French does have a similar word gonze, but this is a loan from Italian.

Etymology from Wiktionary, CC BY-SA 3.0