What is a non-religious use of the word rabbi?

The Word "rabbi" only has a religious meaning. It refers to a Jewish teacher. In modern times, rabbis have also become associated with leading prayer services.

Answer:The above answer is incorrect. I'm not happy about it, but there is a slang definition of "rabbi". Quote:

(noun) By metaphor from the Jewish religious role, an older, more powerful or higher-ranking person in the corporation where one works (but usually not in the chain of command) who can give good advice about office politics, and may be able to pull strings, remove heads, or otherwise provide protection from hostile forces.