cuss (n.)youdaoicibaDictYouDict[cuss 词源字典]
1775, American English dialectal, "troublesome person or animal," an alteration of curse (n.), or else a shortening of the slang sense of customer.[cuss etymology, cuss origin, 英语词源]
cuss (v.)youdaoicibaDictYouDict
"to say bad words," 1815, alteration of curse (v.). Related: Cussed; cussing. To cuss out attested by 1881.