I think it was intentionally goofy. If we take the Fox Force Five thing seriously, then the whole premise of Kill Bill is that it's this failed show (in at least Pulp Fiction's universe) that somehow got made into a movie. So the dialogue being weird and immature at times is in line with what the movie is supposed to be.
Where it doesn't make sense is in movies like Resevoir Dogs and Pulp Fiction, where we're supposed to take constant use of the n-word as "just how people talk... it's totally normal".
Where it doesn't make sense is in movies like Resevoir Dogs and Pulp Fiction, where we're supposed to take constant use of the n-word as "just how people talk... it's totally normal".