In the event of a 'mate' pulling a girl, the 'cupboarder' will recieve notification of the couple's ETA, then promptly strip, conceal themselves in the wardrobe of the 'mate' and wait for the couples arrival. At some crucial moment, with physical activity fully underway, the 'mate' signals for the 'cupboarder' to make their presence felt.
Consequence i) girl gets pissed off and leaves
Consequence ii) Cupboarder is gladly recieved. Cupboarding is a success! Hooray!
Jason: "sweet, i'll be there."