The result of peeing into the wind. (see spliking) A pampousse is the gross moment when the pee gets in your hair. Usually used in a figurative sense, as in the result of a stupid risk taken
Henry: Ewwwwwww, Bob, gross! You got piss in my hair!! You know if you go spliking on a rock someone's gonna get a pampousse!
You park your car up but leave the handbrake off. The car rolls into a lamppost & crashes. For insurance purposes, you blame robbers who stole your car & crashed it on purpose with taking any possessions. "Oh no! I've been pamposted!"
An accident of a car hitting a lamppost that leads to the damage of said car. For insurance purposes, the owner insists that the car was stolen & the robbers hit the lamppost on purpose & didn't steal anything