What does NEG mean in Cajun?

"NEG" is not a word in Cajun French. It's likely you're thinking of "nég," which is the Cajun French word for "no."

Here's how it's used in a sentence:

* "Nég, je veux pas ça." (No, I don't want that.)

Note: "Nég" is a common contraction used in spoken Cajun French. In more formal writing, you might see "non" instead.