crackerjack

adj

1. Exceptionally fine or excellent; top-notch; high quality.

   “Near-synonym: cracking”

2. Expert, top-rated or high-performing.

   “Near-synonym: cracking”

3. (US, not-comparable, slang)Referring to clothing items (pants, jersey, collar) that constitute the traditional blue uniform of the enlisted men of the US Navy.

noun

1. An exceptionally fine or excellent thing or person.
2. An expert or top-rated individual (e.g., a marksman).
3. (US, countable, in-plural, slang, uncountable)The traditional blue uniforms of the enlisted men of the US Navy.
4. (US, countable, slang, uncountable)A U.S. Navy sailor.
5. (US, alt-of, alternative, uncountable)Alternative form of cracker jack; popcorn candied in molasses-flavored caramel and peanuts.

   “"Here, here's the popcorn man," Sid said as a vendor passed, pushing a cart. Sid bought a package of crackerjack and opened it while Mickey jumped up and down, unable to wait.”