middleman

n. intermediary; one acting as intermediary between two parties

Middle man or middleman may mean:An employee - typically a salesperson - who acts on behalf of a company when dealing with customersmiddle man (AIM plugin), an AOL Instant Messenger plugin created by Krunch SoftwareMiddleman node, a node in anonymity networks such as Tor or Mixmaster that only forwards messages to other anonymizing nodes and never lets messages exit the networkMan-in-the-middle attack, a type of attack in cryptographyThe Middle Man is a comic published by the notable independent publisher, Viper Comics.
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(n.)
The man who occupies a central position in a file of soldiers.
  

(n.)
An agent between two parties; a broker; a go-between; any dealer between the producer and the consumer; in Ireland, one who takes land of the proprietors in large tracts, and then rents it out in small portions to the peasantry.
  

(n.)
A person of intermediate rank; a commoner.
  

an independent marketing intermediary; an agent, wholesaler, retailer, etc. See Marketing Channels; Marketing Intermediaries.