foul-mouthed (adj.)youdaoicibaDictYouDict[foul-mouthed 词源字典]
also foulmouthed, 1590s, apparently first in Shakespeare ["Henry IV," 1596]. Earlier were foul-tongued (1540s); foul-spoken (1580s).[foul-mouthed etymology, foul-mouthed origin, 英语词源]