I vaguely remember someone doing this during a conversation in a bar in Japan years ago, and I saw it again in a manga. What does this mean, if anything? I don’t remember what the conversation was about, and we were all drinking so I wouldn’t trust my memory anyway
Just in case no Japanese people answer, check this out for comparison:
My guess is the kid’s asking for a favor, but making a bit of a joke about it.
I feel like Sadhu is the closest feeling