IPA: /ˈkrækərˌdʒæk/
KK: /ˈkrækərˌdʒæk/
Of excellent quality or ability; very good.
She did a crackerjack job on her presentation.
A person or thing that is exceptionally good or excellent.
She is a crackerjack at solving complex problems quickly.
Crackerjack is formed from "cracker" (originating from the verb 'to crack', meaning to break or make a sharp noise) and "jack" (a term used in various contexts, often meaning a man or fellow). The word describes something or someone that is excellent or of high quality, akin to a standout or a top performer.
Think of 'cracker' as something that makes a sharp noise or breaks, and 'jack' as a fellow or man. Together, they help you remember that a 'crackerjack' is someone who stands out as excellent or top-notch.
No commonly confused words.