From The Collaborative International Dictionary of English v.0.48 [gcide]:
Uncouth \Un*couth"\ ([u^]n*k[=oo]th"), a. [OE. uncouth, AS.
unc[=u][eth] unknown, strange: un- (see Un- not) +
c[=u][eth] known, p. p. of cunnan to know. See Can to be
able, and cf. Unco, Unked.]
1. Unknown. [Obs.] "This uncouth errand." --Milton.
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To leave the good that I had in hand,
In hope of better that was uncouth. --Spenser.
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2. Uncommon; rare; exquisite; elegant. [Obs.]
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Harness . . . so uncouth and so rich. --Chaucer.
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3. Unfamiliar; strange; hence, mysterious; dreadful; also,
odd; awkward; boorish; as, uncouth manners. "Uncouth in
guise and gesture." --I. Taylor.
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I am surprised with an uncouth fear. --Shak.
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Thus sang the uncouth swain. --Milton.
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Syn: See Awkward.
[1913 Webster] -- Un*couth"ly, adv. --
Un*couth"ness, n.
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From WordNet (r) 3.0 (2006) [wn]:
uncouth
adj 1: lacking refinement or cultivation or taste; "he had
coarse manners but a first-rate mind"; "behavior that
branded him as common"; "an untutored and uncouth human
being"; "an uncouth soldier--a real tough guy";
"appealing to the vulgar taste for violence"; "the vulgar
display of the newly rich" [syn: coarse, common,
rough-cut, uncouth, vulgar]