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The event of having sperm ejected out of the asshole propeled by way of a flatuent. This occurs after anal sex, that included ejaculation in the anus. The name is derived from the resemblence of the act to that of a natural water geyser, like old faithful, mixed with the hit Clash song Rock the Casbah.
For me the climax of the porn was when the randomly cut to the Shootspa scene
by DaBoy January 28, 2008