cooperate with (someone or something) on (something)(redirected from cooperate with them on)
cooperate with (someone or something) on (something)
To work together with someone or some group in order to complete a particular task or goal. Getting my toddler to cooperate with me on anything is an impossible task. We are in no way blaming you for what happened, but you still have to cooperate with the police on their investigation.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.