piggy (n.)youdaoicibaDictYouDict[piggy 词源字典]
"a little pig," 1799, from pig (n.) + -y (3). Related: Piggies. Piggy bank popular from 1940 (ceramic or tin pig banks are noted by 1903 in American English, sometimes as souvenirs from Mexico).[piggy etymology, piggy origin, 英语词源]