Definition of "high-test" [high-test]

• Of or relating to highly volatile high-octane gasoline. (adjective)
• Meeting exacting requirements. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "When the gas engine came on, Consumer Reports got about 30 miles to the gallon of premium fuel; which, in terms of additional cost of high-test gas, drives the effective mileage closer to 27 mpg."
• "In the old days they were apparently home built or strictly high-test, but with modern collars the highly customizable levels seem to take cruelty out of the equation for any owner."
• "I tend to think of them as non-profit vampires of refrigerator contents and laundry detergent mixed with high-test testosterone."