The act in which a female performs a clambag(girl version of tea bagging, also referred to as 'flapping') while on her period. If done correctly, this should leave a mysterious red dot on the center of the victim's forehead: looking like a stereotypical Indian person.
Anna: That dumb bitch stole my juice box!
Shae: Just wait till she goes to sleep and give her an Indian Mystery!
Anna: Yeah! it's a little fishy, but a bitch gotta learn!