weedy (adj.)youdaoicibaDictYouDict[weedy 词源字典]
early 15c., from weed + -y (2). In old slang, in reference to horses, "not of good blood or strength, scraggy, worthless for breeding or racing," from 1800; hence, of persons, "thin and weakly" (1852).[weedy etymology, weedy origin, 英语词源]