The act of getting high through boiling shampoo and inhaling the poisonous gasses omitted. This, when inhaled for five or more minutes, can cause hallucinations as well as other sensations. It is also known as Bubbling and Shamming.
When a kid from northern PA takes a shit on an ice cube tray freezes the shit then puts the cubes in a friend's asshole whilst trying to light the cubes like coal
I always thought my girlfriend bought too much shampoo, but I didn't realize she was shamboiling behind my back. Now that both of us are doing it, she can buy as much shampoo as she wants!