Question one about Kakashi

During the first Chunin Exam Qualifier in the original book, Kakashi took Sasuke away and sealed the curse mark on Sasuke's body with the Evil Sealing Seal, and Orochimaru arrived at the end.

Kakashi faced the Orochi and said firmly, "Although you are one of the three ninjas, now I can at least die with you," and gathered Chidori in his hand.

However, when the Orochi turned to leave, Kakashi muttered to himself in a cold sweat, "Damn...... Fight like Kilkenny cats......? Am I stupid? ”

This sentence is funny!

What does that mean exactly?

It means that Kakashi realized that his strength at that time was not even qualified to be exhausted, and he was ashamed that he just said big things; Or two, even though he is his own disciple, but for Sasuke to say such things, and maybe he will really take his own life, and regret it.

So, what does this really mean? One or two? Or for another reason, please actively discuss in the book review area~!