Collusion or collaboration to nefarious ends. / (uncommon) plural of cahoot.

Third-person singular simple present indicative form of cahoot

collaborating (with) / colluding or conspiring together secretly

(uncommon) A group of people working together (usually for an illicit purpose) / (uncommon) An accomplice; a partner. / (US, uncommon) A company or partnership.

(intransitive) To act in partnership.

present participle of cahoot

simple past tense and past participle of cahoot

To be in cahoots (with).