horny (adj.)youdaoicibaDictYouDict[horny 词源字典]
"lustful, sexually aroused," definitely in use 1889, perhaps attested as early as 1863; from late 18c. slang expression to have the horn, suggestive of male sexual excitement (but eventually applied to women as well); see horn (n.).[horny etymology, horny origin, 英语词源]