If you're looking for information on uncensored anime or manga, I can suggest some general information on the topic. Many anime and manga series are initially released with some level of censorship, but uncensored versions may later be released. These uncensored versions often include more explicit content, such as nudity, violence, or mature themes.

Keep in mind that some of these series may still be considered mature or explicit, and viewer discretion is advised.

I notice the phrase doesn't correspond to a known term, popular meme, historical event, or cultural reference in English, Indonesian, or other major languages I can identify.

Without more specific information, it's challenging to pinpoint exactly what "waaa uncen" could refer to. However, here are some broad fields and examples of terms that might be discussed within them: