When a cock is inserted into an anus as a solid turd is egressing. The cock must split the turd hot-dog style for it to qualify as a "log splitter." Otherwise, it is known as an Alaskan Coal Miner.
The act of multiple people engaging in a competition of doing anal with multiple people, scraping the shit off your dick and measuring who scraped the most off in the span of a week.
The loser then collects all the shit and puts it in a lava lamp, and it forever sits on their nightstand floating beautifully