A yukkuri eating yukkuri shit. Despite yukkuri shit consisting of their own fillings (e.g paste) and should smell and taste sweet, yukkuris dislike a yukkuri shit's smell and taste.
Sometimes a yukkuri is designated by other yukkuris as a "poo-poo slave" where they'll be thrown into a shit_pit and is forced to eat shit in order to survive. These are either done as clan punishment or by shitheads for fun.