-A restaurant term.
-The thin layer of grease like substance that remains after a family sits at a table at a restaurant. Even if nothing was spilled or otherwise not normal. But remains non the less
"Aww man, I justcleaned table 42 and their was a harsh layer of child grease on it!"
A grease chill is what you get when biting into a highly caloric and greasy food. It also occurs most often after the greasy food settles in your stomach.