Kanchō

Kanchō (カンチョー) is a prank performed by clasping the hands together in the shape of an imaginary gun and attempting to poke an unsuspecting victim's anus, often while exclaiming "Kan-CHO!". It is a common prank among children in East Asian countries such as Japan. In Korea, it is called ddongchim (똥침). In China, it is popularly called qiānnián shā (千年殺), as seen in the anime YuYu Hakusho during episode 67. The word "kanchō" is a slang adoption of the Japanese word for enema (浣腸). 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 grabbing of the buttocks with the tips of the fingers and thumb in imitation of a harmless bite on the butt from a goose. However, the kanchō prank may also be known as goosing.