Definition
In close collaboration or collusion, often implying a dishonest or underhanded partnership.
勾結，密切合作（常指幹壞事）
The two companies have been working hand in glove for years; their interests are intertwined.
這兩家公司多年來一直密切合作；他們的利益交織在一起。
The investigation revealed that the politician was hand in glove with several businessmen; they were clearly in cahoots.
調查顯示，這位政客與幾位商人關係密切；他們顯然是同夥。
It's rumored that the two rivals are actually working hand in glove to manipulate the market.
有傳言說，這兩個競爭對手實際上正在密切合作以操縱市場。