[The Cajun]

Or coup nord.

Yup, went with how it's pronounced in Cajun French.
Probably based on the proper French of " coup de grâce" with "de grâce" replaced with "nord" (north).

But it is pronounced "Kou Nor" down here.

[Fiji Hill]

"Kou Nor" is how you pronounce coup nord in standard French. It apparently means "north shot," an appropriate name for such a phenomenon.