社会黑势力之间的互相吞并、倾轧forceful oppression of one criminal syndicate by another

• 阿东正策划着一场黑吃黑的抢劫。

  Ah Dong is planning a robbery to defeat another criminal gang.

• 广州白云区警方破获一起“黑吃黑”故意杀人案。

  The police in Baiyun district, Guangzhou, cracked a murder case linked to a conflict between criminal gangs.