ringer (
http://definr.com/ringer)
n 1: a person who rings church bells (as for summoning the
congregation) [syn:
toller,
bell ringer]
2: (informal) a person who is almost identical to another [syn:
dead ringer]
3: a contestant entered in a competition under false pretenses
4: (horseshoes) the successful throw of a horseshoe or quoit so
as to encircle a stake or peg