"Brazuca" is a friendly, non-offensive way brazilians use to adress themselves. This variation is much more commonly heard abroad, accompanied by a positive attitude. It has therefore some light degree of patriotism. Plural would be "brazucas".
The pronounciation would be something like "Brah-zoo-kah"
Lucas and a friend are discussing on a chat channel:
Lucas: Then we sold our pick-up truck and we flew back to Brazil for summer vacation.
Third person joins channel and overhears last sentence.