finger man

noun Slang.

a person who points out someone to be murdered, robbed, etc.

Origin of finger man

An Americanism dating back to 1925–30

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for finger man

Historical Examples of finger man

Even if Nast were finger-man for a bandit gang he would get nothing except clothes and ordinary, easily replaced tools.
The Golden Skull
John Blaine