十分村魯 You Coarse Boorish Monk
道士怒道：「你這和尚，十分村魯！怎麼把我鍾子捽了？」行者罵道：「你這畜生！你看我那三個人是怎麼說？道士怒道：「你这和尚，十分村鲁！怎么把我钟子捽了？」行者骂道：「你这畜生！你看我那三个人是怎么说？
逐句解 Line by line
"You monk!" said the Daoist furiously. "What an utter boor!"
村魯 is rustic and crude — 村 here is not the noun for a village but the adjective it produced, country-bumpkin, and it is one of the commonest insults in this book. 十分 is ten parts out of ten, entirely. The register has dropped from 老師父 to this in the space of two passages.
"How dare you fling down my cup?"
捽 is zuó, to seize and dash down — a reading settled in the previous chapter of this project and confirmed here without help. It is a physical, violent verb, and he is using it about a teacup, which tells you how much he minds.
"You animal!" swore Pilgrim back.
畜生 reduces its second syllable to sheng, one of the corpus's small set of genuine modern neutrals alongside 尾巴 and 豆腐. Literally a domestic beast, it is the standard Chinese insult for someone who has behaved subhumanly — and it will turn out, in this case, to be a description.
"Look at those three of mine — what do you call that?"
是怎麼說 is "what is the account of this", "how do you explain that" — an idiom demanding a justification rather than a description. He is pointing at three bodies on the floor.
Two men shouting at each other, and the chapter's whole surface has inverted. The Daoist — who has just poisoned three guests — is genuinely angry about a broken cup and calls his guest a peasant. Pilgrim calls him an animal. Neither insult is chosen at random.
村魯 is about class: you are coarse, you have no breeding, you do not know how to behave in a house. It is the complaint of a man whose entire method has been impeccable manners, and he means it. He has been offended.
And 畜生 is about species. Pilgrim is not saying the Daoist is rude; he is saying he is not a person. In a book where roughly half the cast turn out to be animals wearing human shape, that is less an insult than a diagnosis, and it is about to be confirmed.