he huffed and puffed as he made his way up the mountain
English Slang Dictionary
1. rubbish, nonsense;"That film was a load of chuff" 2. the anus. [Aust.] 3. the vagina 4. a passing of wind from the anus, a "fart"; 5. used as a euphemism for "fuck" in expressions such as the denial - "Did I chuff!"