What does Anal Geyser mean?

Anal Geyser meaning in Urban Dictionary

After a guy rectal creampies a chick, the chick gets down on all fours and things the woman asshole in the air. The chick then convulses her asshole aided by the force of 1,000 atmospheres in order to capture the sperm straight back out her butt and to the air in a majestic display of sperm, shit chunks, blood, and beauty. This work is reminiscent of 'Old Faithful' erupting.