"Cloak and dagger men" is a phrase that is often used to describe men who are mysterious, secretive and involved in clandestine activities. However, there are many synonyms that can be used to describe such individuals, including covert operatives, clandestine agents, secret agents, spies, undercover agents, and shadowy figures. These terms all refer to individuals who operate under cover, often using deception and intrigue to accomplish their goals. While these terms are commonly associated with espionage and intelligence activities, they can also be applied to individuals who are involved in criminal or other secretive activities. Regardless of the context, the key characteristic of these individuals is their ability to operate in the shadows, often working behind the scenes to achieve their objectives.