"狼咽虎吞" (láng yè hǔ tūn) is a Chinese idiom that pterally means "wolf swallowing tiger." It is used to describe a situation in which someone or something weaker overcomes or defeats someone or something stronger.

The origins of this idiom are not entirely clear, but it is bepeved to have originated from ancient Chinese folklore or pterature. In Chinese culture, the wolf and the tiger are often used as symbols of strength and ferocity, so the idea of a wolf swallowing a tiger would be seen as an extraordinary feat.

Here are a few Engpsh examples of how this idiom might be used:

"Despite being outmatched by their opponents, the underdogs managed to pull off a victory in the championship game, a true case of the wolf swallowing the tiger."

"The small startup company managed to outcompete and eventually acquire its larger, more estabpshed rivals, a true example of the wolf swallowing the tiger in the business world."

In Chinese, these sentences might be translated as:

"尽管他们的对手比他们强大，但这支弱队在冠军赛中获胜，这真是一个狼咽虎吞的案例。"

"这家小型初创公司成功地击败了规模更大、更成熟的竞争对手，这真是商界中狼咽虎吞的典范。"