1. An act of forcible exhalation
   "His huffing and puffing showed how out of shape he was";
   - puffing, snorting

1. Blow hard and loudly
   "he huffed and puffed as he made his way up the mountain";
   - puff, chuff
    
2. Inhale recreational drugs
   "the kids were huffing glue";
   - snort [slang]

Type of: blow, breathe in, breathing out, exhalation, expiration, inhale, inspire

Encyclopedia: Huffing