A twisted "game" created by motorcyclists that congregate at a San Diego bike night gathering (in Mira Mesa). Played by attempting to make (mostly harmful) physical contact with another player's genitals.
Players usually stand around in a circle (or semi-circle) discussing random topics and randomly a player will try to "box-check" another by taking a strike at their genitals. The game attempts to make use of several diversions, such as riddles or jokes to distract players.
The box-check is the female version of a "bing-bong"
Most of the motorcyclists at said San Diego Bike Night gathering know that if they try to box-check MCC, she will introduce them to the ground.