close·tom·er
noun
1. A person or organization that intentionally inhibits a business from closing their duties within its operational hours. These individuals will enter a retail store, restaurant, or business- with the explicit purpose of detaining the employees on the premises from going home for the day.
A dom, usually one which, as the name suggests, is in the closet. They are usually inexperienced with sex.
This is unlike a under-dom, as the closet dom does not want to believe they are a dom, or they want to be a sub, but in reality they cannot help themselves from their inner dom. Not to say they are particularly dominant in secret, but that they are in the end the dominant one.
Vel: "I bet Karl is a closet dom; he wants to be a sub, but he's really a dom.