Do you know what is "kancho"?
It's a funtastic game that you can play everywhere, without using anything but your fingers!
You have to clasp your hands together in the shape of an imaginary gun, then you choose your unsuspecting victim, attempting to poke his or her anus, while exclaiming "Kan-CHO!"
Then, while your victim is screaming for the bad surprise, you have to sniff your fingers.
:D
Well, that's very funny but pay attention 'cause someone without sense of humor could think that you are a pervert!!!
UAHAHAAHAHAH!
KANCHO is a slang word for the japanese term "enema" and is common among children in East Asian countries.
It derives from the japanese skill known as "Leaf village's secret finger jutsu: A thousand years of death" that we have seen in NARUTO. In fact, in this famous manga/anime, Kakashi Hatake uses it during his ninja training.