A place surrounded by unwanted ears. When you are on the phone with someone and you can't say something because there are too many people around to hear it (with their ears).
D: So L has a nasty rash that she needs antibiotics for.
K: How did she get it?
D: I cant say right now I am in a cornfield.
K: Oh too many ears in the room right now. Cool call me later and tell me what happened.