know where all the bodies are buried

know where (all) the bodies are buried

To know everything about someone or group, especially secret things that they might not want to be revealed. Usually used in relation to someone who wields this information for their own benefit or advantage. I've been an accountant with this company for over 50 years, so trust me, I know where all the bodies are buried. He climbed to power because he knew where the bodies were buried for every single person at the top of the government and the military.
See also: body, bury, know

know where all the bodies are buried

Fig. to know all the secrets and intrigue from the past; to know all the relevant and perhaps hidden details. He is a good choice for president because he knows where all the bodies are buried. Since he knows where all the bodies are buried, he is the only one who can advise us.
See also: all, body, bury, know