Its what happens when you fart so badly that the thick layer of skin is a.k.a leather donut) is ripped and shredded to peices usually caused from to much anal sex
The act of sodomising a colostomy hole; a homosexual male couple that enjoys regular anal intercourse may find this act necessary after one or possibly both of the couple recieve a colostomy procedure.
A certain individual had colon cancer and he now is required to gain sexual pleasure through penetration of his colostomy hole(Oklahoma O-Ring).
When the lips of your anus, which form an "O", stretch to such an extent due to hours on the toilet, the "O" of your anal lips tear. Thus, you have blown your O-Ring, as well as lost your anal virginity.