"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.
例文
1. I tried to chuff her up in vain.
彼女を喜ばせたいのですが、無駄でした。
2.When I was in trouble,he would chuff me up and help me.