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I'll venture a guess: it's like self-deprecation, but on the other hand, self-irony is usually the domain of a strong person, and the message is ultimately about that.
Maybe, but there's still a hint of disrespect towards the interlocutor.
So, the fact that he associates himself with a cheerful jerk doesn't automatically indicate disrespect towards the interlocutor. Complex gestures as a sign of respect – this is a cultural code accepted specifically in our country.