Kanchō (game)
Kanchō ( Japanese カ ン チ ョ ー ) is a prank that is often played by school children in Japan . It is also in South Korea as Ttong chim , Ddong chim or dong chim ( kor. 똥침 , 糞針 ) and the Philippines as Tumbong known.
Action
Kanchō involves putting your hands together so that your index fingers are outstretched and trying to stick them into someone else's anus when they are inattentive. The term is derived from the Japanese word for enema ( 浣腸 , kanchō ).