Wiktionary
coonass
n. (context derogatory dialectal Louisiana southeast Texas English) A White Acadian French person who lives in the swamps.
Wikipedia
Coonass
Coonass, or Coon-ass is used in reference to a person of Cajun ethnicity. Many consider the term an insult, but others consider it a compliment or badge of honor. Although many Cajuns use the word in regard to themselves, other Cajuns view the term as an ethnic slur against the Cajun people, especially when used by non-Cajuns.
Usage examples of "coonass".
Elward was as always talking that White Castle-Plaquemine coonass slang.