1. Shear extreme surprise.
2. The
flapping of a holy ones ass cheeks, such as the
pope.
3. When something so
crazy happens that Jesus applauds you with his ass cheeks.
-A ass ninja flys out of nowhere briefly and then disappears into the shadows.-
Justin: Holy
flapping ass cheeks! Did you see that ass ninja!
Matt: ....... -Slaps Justin for shear
stupidity and then quickly disappears just like the ass ninja-
Justin: -After realizing that Matt was the ass ninja- Holy
flapping ass cheeks!