super garruda
n.— «So, you may be asking, what’s an example of a really good, equally obscure and difficult question? Well, how about this one, the “super garruda” (a made-up word meaning final and most difficult question) from the 2003 contest.» —“Strange questions, devoted players, passionate trivia masters keep LU contest thriving” by Cheryl Sherry Appleton Post-Crescent (Wisconsin) Jan. 25, 2007. (source: Double-Tongued Dictionary)
I was a quizmaster at Lawrence back in the early ’90s. The super garruda was the hardest of the final few questions, which were referred to as garrudas. I don’t know when the term originated, but it predated me by years.