Kanchō

Kanchō (カンチョー; pronounced [kaɲtɕoː]) is a prank performed by clasping the hands together in the shape of a finger gun and poking the anus of an unsuspecting person, often while exclaiming "Kan-cho!"^[1] It is a common prank in East Asian countries such as Japan.^[2] In Korea, it is called ttongchim (똥침; 똥針, pronounced [t͈oŋ.tɕʰim]),^[3][4] and in China, qiānnián shā (千年殺). The word "kanchō" is a slang adoption of the Japanese word for enema (浣腸, kanchō).^[5] In accordance with widespread practice, the word is generally written in katakana when used in its slang sense and in kanji when used for enemas in the medical sense.

In English-speaking countries, the term "goosing" generally refers to a comparatively mild poke, prod, or pinch on or between the buttocks with the tips of the fingers and thumb, in imitation of a harmless bite on the butt from a goose.^[6][7] This does not typically involve direct contact with or penetration of the anus. However, the kanchō prank may also be informally known as "goosing" in some contexts.^[3]

Unlike traditional goosing, kanchō involves directly targeting the anus, which means that performing it without consent in jurisdictions such as the United States could constitute assault, battery, or sexual assault/battery, depending on factors such as the victim's age, the circumstances, intent, and local laws. This may lead to criminal charges, fines, school discipline, or other consequences.^{[3][8][9][10]}