anal ripcord
The drawstring attached to a tampon inserted in the ass for the sexual pleasure of having one shit on another at the point of sexual climax. (The removal of the tampon causes the removal of whatever else is up there.) Pull the ripcord at go time and watch out. Common in Europe...so I've heard.
Jane pulled Dick's anal ripcord just as she was about to cum and that afternoon's turkey sandwich came spilling out all over the bed...it was the best sex either had ever had.