Heavy; grave; gloomy; dull; -- the opposite of mercurial; as, a saturnine person or temper.

showing a brooding ill humor; "a dark scowl"; "the proverbially dour New England Puritan"; "a glum, hopeless shrug"; "he sat in moody silence"; "a morose and unsociable manner"; "a saturnine, almost misanthropic young genius"- Bruce Bliven; "a sour temper"; "a sullen crowd"

characteristic uh a sucka' havin' some gloomy o' fo'biddin' appearance.

characteristic of a geezer havin' a gloomy or forbiddin' appearance.

characteristic of a person having a gloomy or forbidding appearance.