Gills

overlarge shirt collars.
The cheeks. To look rosy about the gills; to have a fresh complexion. To look merry about the gills: to appear cheerful.
the lower part of the face.—Bacon. “To grease one's gills ,” “to have a good feed,” or make a hearty meal. A man suffering from the effects of a previous night's debauch, is said to “look queer about the gills.”