[Tucker39]

A whippersnapper was a young kid with a toy whip that had a cord on the end that snapped or popped or cracked if you flipped the whip correctly. The term “cracker” was coined by black slaves referring to the overseer who usually carried a whip, and frequently “cracked” it to demonstrate his power.

[oldvirginian]

Not even close.
Whippersnapper
https://www.phrases.org.uk/meanings/whipper-snapper.html

[Albion Wilde]

The term “cracker” was coined by black slaves referring to the overseer who usually carried a whip, and frequently “cracked” it to demonstrate his power.

Incorrect. The word "craic" is Irish Gaelic for "yak" or "blabber". The state of Georgia was settled by many Irish and Scots-Irish Gaelic speakers. A craic-er was a big talker or a braggart, or someone who yakked too much, or talked idly.

Craic is still used as a slang term by English-speaking Irish people. Wanting to ingratiate himself with Irish college students whom he was about to address in 2013, Barack Obama walked onstage and asked them, "What's the craic?" ...the way we would say, "What's the talk around campus?"