crackerjack

Short definition from Wiktionary

Adjective

1. 1
   Exceptionally fine or excellent; top-notch; high quality.
2. 2
   Expert, top-rated or high-performing.
3. 3
   Referring to clothing items (pants, jersey, collar) that constitute the traditional blue uniform of the enlisted men of the US Navy.

Noun

1. 1
   An exceptionally fine or excellent thing or person.
2. 2
   An expert or top-rated individual (e.g., a marksman).
3. 3
   The traditional blue uniforms of the enlisted men of the US Navy.
4. 4
   A U.S. Navy sailor.
5. 5
   Popcorn candied in molasses-flavored caramel and peanuts.