doozy

(noun, adjective)

adjective

1. (slang, dated) Of high quality; remarkable; excellent. [1903]

2. (slang, US, archaic) Sporty, ostentatious, flashy. [1911]

noun

1. (US) something that is extraordinary. Often used in the context of troublesome, difficult or problematic, but can be used positively as well.

- Most of the test was easy, but the last question was a doozy.