Jisho

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カンチョー
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Noun
1. poking someone's anus with one's index fingers (childish prank)​Slang, See also 浣腸, from 浣腸
Wikipedia definition
2. Kancho​is a prank often played in Japan; it is performed by clasping the hands together so the index fingers are pointing out and attempting to insert them sharply into someone's anal region when the victim is not looking. It is similar to the wedgie or a goosing, although, as compared to kancho, the former mentioned acts do not involve physical contact which is quite as intimate or direct.
Read “Kancho” on English Wikipedia
Read “カンチョー” on Japanese Wikipedia
Read “Kancho” on DBpedia

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