Apartment Outhouse
The act of using an apartment balcony as a toilet. Letting the raw sewage flow down on the neighbors below you. If the volume is large enough it can have the appearance of a waterfall. Repeated use will cause the patio furniture to rust changing the flow to a rusty orange color. Most often used by Frat boys and major douchebags.
My upstairs neighbor was too lazy to go walk to the bathroom and used the apartment outhouse.