Inside man can be synonymous with several terms. For instance, it can be referred to as a mole, an informer, a plant, or even a spy. All these terms are used to describe individuals who work within an organization while secretly working with an opposing party. The objective of an inside man is to obtain valuable information from the organization and transmit it to the opposing party. Inside men have been used extensively in the corporate world, politics, espionage, and crime. However, these activities are largely illegal and come with serious consequences. Therefore, it's always advisable to refrain from getting involved in such activities, as they can damage one's reputation and lead to legal consequences.