The phrase refers to the act of acquiring and installing a specific type of application package file (APK) on an Android device, purportedly associated with a slot machine game that commonly features the number 777. This process entails obtaining the installation file from a source outside of the official Google Play Store and manually installing it on a compatible device.
The allure of such downloads often stems from the perceived potential for easy winnings or unique features not found in officially sanctioned applications. Historically, the proliferation of these files has been fueled by the desire for modifications, early access, or circumventing regional restrictions often associated with standard application distribution.