A patch of hair grown on a lady in her private area just above the vagina (fu fu) in a moustache shape. Note you can get many variations such as a handle bar fustache or Hitler fuatache.
She has a fustache on her fanny she shaped herself.
A very thin, almost imperceiveable spread of facial hair found on the upper lip. Often found on teenage males.
Look at Bobby's little fustache.