To act in collusion for evil purposes; to be partners in crime; to gang up to do mischief.
那个公司的两个负责人为了个人利益，互相勾结，做了许多损害集体利益的事情，简直是狼狈为奸
The two responsible persons of that company, for their personal gain, colluded with each other and did many things that harmed the collective interest, truly acting as partners in crime.
Era:
Early Modern
Frequency:
Story:
Once upon a time, a wolf and a 'bèi' (a legendary animal said to have very short forelegs) approached a shepherd's sheepfold, intending to steal a sheep to eat.
The sheepfold was too high for them to jump over. So, they devised a plan: the wolf stood on the 'bèi''s back, and the wolf used its front paws to grab a sheep.
In this way, the wolf forcefully grabbed a sheep, pulled it out of the enclosure, and they both enjoyed the meal together.
This tale illustrates their cooperation in committing mischief.
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