highest-octane

Adjective

high-octane (comparative higher-octane, superlative highest-octane)

1. Of fuel, having a high octane number, good antiknock characteristics; used in high-performance vehicles.
   • Now, to do the job, I need some high-octane gasoline.1982, Terry Hayes, George Miller, Mad Max 2: The Road Warrior, spoken by Max (Mel Gibson)

   Antonyms:

   low-octane

2. (broadly, figuratively) High-powered, energetic, forceful or dynamic.
   • So what if the Greeks never had BMX bikes? This year's Olympic Games, which kick off August 8 in China, add high-octane competitions—BMX racing and open-water swimming—and include sports like table tennis taken to Olympian levels.2008 January–February, Matt Bean, “Your cultural calendar: 7 things to look forward to this year”, in Men's Health, volume 23, number 1, →ISSN, page 135

   Antonyms:

   low-octane

3. (figuratively) Of a drink, highly intoxicating or caffeinated.
   • There's no question that the high-octane beers of Marshall Wharf have had a massive influence on the breweries that have opened in Maine since 2007.2013, Josh Christie, Maine Beer: Brewing in Vacationland, Arcadia Publishing, →ISBN