The term has gained significant traction online, particularly on social media platforms and forums, where it's often used to poke fun at or praise someone's impressive skills or accomplishments.

The term is thought to have originated from the idea that a teacher or sensei is someone who can expertly navigate and instruct others through even the most challenging or "messy" situations, much like a skilled oshikko sensei might be able to handle a difficult or unpleasant topic with ease and authority.

I see you're referring to a popular Japanese term!