gonzo surfer

巨大な波を求めて挑戦したサーファーの記事、Finding the PERFECT WAVE（Reader's Digest 6月号）にあった単語がきになりました。場所はSan Diego, CA 沖のCortes Bankで並みの高さは23.4mにも達したそうです。
The Bank became an obsession for Flame. In 1990, he and a gonzo surfer and bush pilot named Mike Castillo decided to see it for themselves. From a tiny Cessna about 100m up, Flame and Castillo were shocked to find a titantic, unruly wave unloading onto the submarine reef.
"gonzo surfer" の "gonzo" は日本語の様な響きがありますが、何でしょう。 辞書を見ます。
・Merriam-Webster's Learner's Dictionary: having a very strange or unusual quality: gonzo humor; a gonzo comedian; gonzo journalism (=journalism that treats a subject in a very personal, unusual, and often shocking way)
・Oxford English Dictionary: bizarre or crazy: the woman was either gonzo or stoned
発音はゴンゾウではありません。私にはガンゾウと聞こえます。