When a furry shoves their tail into their anus while suffering from diarrhea. They allow the diarrhea to build up, before pulling out the tail & letting the diarrhea spray, like a volcano.
Person 1: What do you do in your free time?
Person 2: I like doing a furry volcano.
Person 1: Whatâs that?
Person 1: Iâll show you!