dirty pool

基本解释

There used to be dirty pool here.
以前这里有个污水池。
Everyone thinks they played dirty pool and bribed the officials who awarded the contract.
大家都认为他们作了不正当交易，贿赂了授与合同的官员。
The water in the swimming pool is dirty, full of bacteria.
游泳池的水很脏，充满细菌。

Looks like dirty pool to us.
FORBES: First, indict all the lawyers
Microsoft will continue to complain because playing dirty pool is in their corporate DNA. Google has made some stupid mistakes in the last few years (being in China, Google Buzz, poor explanation of capturing WiFi packets, etc.), but compared to Microsoft, they are far better for the consumer in this dimension since Microsoft will do anything and everything to have their way.
FORBES: Assessing Winners and Losers in Google's Worldwide Antitrust Battles