Source : Webster's Revised Unabridged Dictionary (1913)

Chuff \Chuff\, n. [Perh. a modification of chub: cf. W. cyff
   stock, stump.]
   A coarse or stupid fellow. --Shak.

Chuff \Chuff\, a.
   Stupid; churlish. [Prov. Eng.] --Wright.

Source : WordNet®

chuff
     v : blow hard and loudly; "he huffed and puffed as he made his
         way up the mountain" [syn: {puff}, {huff}]