The "Secret Ear" is not a commonly recognized term in any field. It could be a metaphorical expression or a slang term used in a specific context. Without more information, it's impossible to provide a definitive answer.
Possible interpretations include:
- A metaphorical expression: This might refer to someone who is a good listener and pays close attention to what others say, even if they don't appear to be listening.
- A slang term: This could be a colloquialism used in a specific community or region, with a meaning unknown outside that group.
To understand the meaning of "Secret Ear," more context is needed. For example, where did you hear this phrase? What was the conversation about?