chuff 1 (chŭf) n. A rude, insensitive person; a boor.
[Middle English chuffe.]
chuff 2 (chŭf) intr.v.
chuffed, chuf·fing, chuffs To produce or move with noisy puffing or explosive sounds: "Switch engines chuffed impatiently in busy rail yards"(Robert Paul Jordan). n. A noisy puffing or explosive sound, such as one made by a locomotive.