oohyoudaoicibaDictYouDict[ooh 词源字典]
exclamation of pain, surprise, wonder, etc., 1916. Combined with aah from 1953. Ooh-la-la, exclamation of surprise or appreciation, is attested 1924, from French and suggestive of the supposed raciness of the French.[ooh etymology, ooh origin, 英语词源]
racy (adj.)youdaoicibaDictYouDict
1650s, "having a characteristic taste" (of wines, fruits, etc.), from race (n.2) in its older sense of "flavor" or in the sense "class of wines" + -y (2); meaning "having a quality of vigor" (1660s) led to that of "improper, risqué," first recorded 1901, probably reinforced by phrase racy of the soil "earthy" (1870). Related: Racily; raciness.