The prettiest woman in rural backwoods or swamp areas. She looks good because she is better looking than the other ugly women found in the area. Most likely to be found at the bar and sighted by a man who has had too much to drink.
Drunk - "Hey bartender, see that pretty little swamp angel over there. I'm gonna try and take her home tonight."
Bartender - "You might want to take off your beer goggles and re-examine her."
Drunk - "I'm not drunk, she's beautiful!"