chuffyoudaoicibaDictYouDict[chuff 词源字典]
"pleased, happy," c. 1860, British dialect, from obsolete chuff "swollen with fat" (1520s). A second British dialectal chuff has an opposite meaning, "displeased, gruff" (1832), from chuff "rude fellow," or, as Johnson has it, "a coarse, fat-headed, blunt clown" (mid-15c.), which is of unknown origin. Related: Chuffed.[chuff etymology, chuff origin, 英语词源]