A wolf eats a tiger
As a Chinese idiom, the Pinyin is l á NGC ā NH ǔ sh í, which means eating fast and fiercely. From the outlaws of the marsh.
The source of the idiom is Chapter 15 of outlaws of the Marsh: "the three brothers of the Ruan family let Wu Yong eat a few pieces, but they couldn't eat them; the three brothers ate them once."
A wolf eats a tiger