gal (n.)youdaoicibaDictYouDict[gal 词源字典]
slang pronunciation of girl, 1795, originally noted as a vulgarism (in Benjamin Dearborn's "Columbian Grammar"). Compare gell, 19c. literary form of the Northern England dialectal variant of girl, also g'hal, the girlfriend of a b'hoy (1849). Gal Friday is 1940, in reference to "Robinson Crusoe."[gal etymology, gal origin, 英语词源]