'dead ringer' is a thing or a person that is an exact copy of something or somebody.
for example:
"I saw a woman in the elevator who was a dead ringer for Angelina Jolie."
"That copy of the Mona Lisa is a dead ringer for the original."
This blog is mainly to explain a different English language expression every day. Sometimes I post other stuff. I also have a YouTube channel which is mostly about computer software: https://www.youtube.com/englishspacedog
