sullen adj
1: 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" [syn: dark, dour, glowering, glum, moody, morose, saturnine, sour]
2: darkened by clouds; "a heavy sky" [syn: heavy, lowering, threatening]