As of my last knowledge update in January 2022, "MBWhatsApp" typically refers to a modified version of the original WhatsApp messenger. These modified versions are created by third-party developers and are not officially endorsed by WhatsApp. The "APK" in the term refers to the Android Package Kit, which is the file format used for Android applications.

MBWhatsApp is one of several modded versions of WhatsApp that offer additional features, customization options, and tweaks not present in the official WhatsApp application. These modifications might include enhanced privacy settings, theming options, or other functionalities.

Here are some general points about modded versions like MBWhatsApp:

1. Additional Features: Modded versions often include features not found in the official WhatsApp, such as the ability to hide online status, customize the user interface, use multiple accounts, and more.
2. Customization: Users can often personalize the look and feel of the app with themes, fonts, and other visual elements.
3. Privacy Settings: Some mods offer advanced privacy settings, giving users more control over who can see their online status, last seen, and other profile information.
4. Risks and Concerns: While modded versions can be appealing due to their additional features, there are potential risks. These versions are not officially supported by WhatsApp, and using them may violate WhatsApp's terms of service. They may also pose security risks or lack the same level of privacy and encryption as the official app.

It's important to note that the information provided here is based on my knowledge as of January 2022, and there may have been developments or changes since then. If you're interested in using MBWhatsApp or any similar mod, it's recommended to exercise caution, be aware of the potential risks, and ensure that you download such applications from reputable sources. Keep in mind that using modded versions may have consequences, including the risk of temporary or permanent bans from WhatsApp.