If you are frivolous, you will lose the virtue of a gentleman; The villain will kill me. What do you mean?

The original sentence should be: frivolous words should not be said, the giver loses my virtue, and the giver kills me.

The preposition "Yu" is omitted.

Don't say frivolous things (those who look down on others and play with others)

These words are addressed to gentlemen. Perhaps gentlemen don't care, but they seem too tasteless. "Losing my virtue."

These words tell the villain that he bears a grudge. If he wants revenge or something serious, he will be killed, and he will "kill me."