wiretapper

[wahyuh r-tap-er]

noun

a person who taps wires to learn the nature of messages passing over them.
a swindler who professes to have betting tips or other information from tapped telephone wires.

Origin of wiretapper

First recorded in 1890–95; wire + tapper2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for wiretapper

auditor, snoop, sleuth, hearer