Japanese Fish Ass
The act of inserting a live fish or many small fish into someones asshole.
Me: Hey Hideki what the fuck are you doing with my goldfish?
Hideki: I'm practicing the ancient art of Japanese Fish ass.
"Hideki san like to practice ancient art of Japanese fish ass"
Hideki: I'm practicing the ancient art of Japanese Fish ass.
"Hideki san like to practice ancient art of Japanese fish ass"