Etymology
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hip (n.1)
"part of the human body where pelvis and thigh join," Old English hype "hip," from Proto-Germanic *hupiz (source also of Dutch heup, Old High German huf, German Hüfte, Swedish höft, Gothic hups "hip"), of uncertain origin. In architecture, "external angle at the junction of two sides of a roof," from late 17c. Hip-flask, one meant to fit in a hip pocket, is from 1923. Related: Hips.
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hip (n.2)
"seed pod" (especially of wild rose), a 16c. alteration of Middle English hepe, from Old English heope, hiope "seed vessel of the wild rose," from Proto-Germanic *hiup- (source also of dialectal Norwegian hjupa, Old Saxon hiopo, Dutch joop, Old High German hiafo, dialectal German Hiefe, Old English hiopa "briar, bramble"), of unknown origin.
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hip (adj.)
"informed," 1904, apparently originally in African-American vernacular, probably a variant of hep (1), with which it is identical in sense, though it is recorded four years earlier.
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hip (interj.)
exclamation used to introduce a united cheer (as in hip-hip-hurrah), 1827, earlier hep; compare German hepp, to animals a cry to attack game, to mobs a cry to attack Jews (see hep (2)); perhaps a natural sound (such as Latin eho, heus).
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hip-shot (adj.)
"with the hip dislocated," 1630s, from hip (n.1) + shot (adj.). The notion is "with the hip shot out of place."
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hippy (adj.)
"having prominent hips," 1919, from hip (n.1) + -y (2).
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hipped (adj.)
"having hips," c. 1500, past-participle adjective; see hip (n.1)). In architecture (of roofs) from 1785.
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hippie (n.)
c. 1965, American English (Haight-Ashbury slang); earlier (1953) a variant (usually disparaging) of hipster (1941) "person keenly aware of the new and stylish," from hip "up-to-date" (see hip (adj.)). Related: Hippiedom.
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yippee (interj.)

interjection of pleasure, exultation, etc., by 1902; perhaps an extension and modification of hip (interj.).

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hipster (n.)
1941, "one who is hip;" from hip (adj.) + -ster. Meaning "low-rise" in reference to pants or a skirt is from 1962; so called because they ride on the hips rather than the waist (see hiphuggers). Related: Hipsters (1962, of waistlines).
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