Sex act involving at least 5 women and one man where in the man inserts each foot into the vagina of two of the women, each fist in another 2, and one on top of his head. In extreme cases, another woman can be used as a codpiece. The man then walks around crushing cardboard boxes like the megazord from power rangers.
Man, I just did the megazord with these 6 chicks and now their vaginas are ruined! High five!