A deviant sexual act. After sex, the man ejaculates on the woman's stomach, then urinates on her. After this, the man dives headfirst across the woman onto the newly slippery bed. Goggles are recommended for the unexperienced.
"Did you hear Adrian gave another girl a Stockholm Slip-n-Slide?"
"Yeah man, he told me she broke a rib and the entire bed had to be set on fire. What a champ."