FritzyoudaoicibaDictYouDict[Fritz 词源字典]
German familiar form of masc. proper name Friedrich; as a characteristic name for a German attested by 1883; very common in World War I. Phrase on the fritz "inoperative, not working properly" (1903) is American English slang, of unknown connection to the name; the earliest references suggest a theatrical origin.[Fritz etymology, Fritz origin, 英语词源]