ringman

Noun

 * 1) A male entertainer who works in the ring of a circus.
 * 2) A man within the betting ring of a racecourse; a bookmaker who works in the ring.
 * 3) A male boxer or prizefighter.
 * 4) A man who works in a ring where animals are exhibited.
 * 5) An auctioneer's assistant who spots bids and communicates information back to the auctioneer.
 * 6)  The ring finger.