FOG-BOW. A beautiful natural phenomenon incidental to high latitudes. It appears opposite to the sun, and is usually broad and white, but sometimes assumes the prismatic colours. Indicative of clearing off of mists. (See [Fog-eater].)
FOG-DOGS. Those transient prismatic breaks which occur in thick mists, and considered good symptoms of the weather clearing.
FOG-EATER. A synonym of fog-dog and fog-bow. It may be explained as the clearing of the upper stratum, permitting the sun's rays to exhibit at the horizon prismatic colours; hence "sun-gall."
FOGEY. An old-fashioned or singular person; an invalid soldier or sailor. Often means a stupid but irascible fellow.
FOGGY. Not quite sober.
FOGRAM. Wine, beer, or spirits of indifferent quality; in fact, any kind of liquor.
FOG-SIGNALS. The naval code established by guns to keep a fleet together, to tack, wear, and perform sundry evolutions. Also, certain sounds made in fogs as warnings to other vessels, either with horns, bells, gongs, guns, or the improved fog-whistle.
FOIL. A blunt, elastic, sword-like implement used in fencing.—To foil means to disconcert or defeat an enemy's intention.
FOILLAN. The Manx or Erse term for a gull.
FOIN. A thrust with a pike or sword.