The San Andreas Fault Line is a sexual maneuver where a male spreads his partner's buttcheeks and proceeds to defecate in his partner's
spread buttcrack. Once he has finished, he then presses his partners's buttcheeks together. He then proceeds to
shake his partner's butt in any
way he can, which can include but is not limited to shaking or slapping. While he is doing this, he is screaming "EARTHQUAKE". After he is finished, he calculates how much
feces escaped the buttcrack during the earthquake and gives it a rating on the Richter Scale.
"When my girlfriend said we should go to
California to see the San Andreas Fault
Line, I didn't expect an earthquake THAT
big."