Puffer may mean:
- Inhaler, a medical device used for delivering medication into the body via the lungs
- Pufferfish, a type of fish which can inflate itself as a defence mechanism
- Clyde puffer, a type of cargo ship used in the Clyde estuary and off the west coast of Scotland
- USS Puffer, two submarine vessels of the United States Navy
- Puffer train (cellular automaton), a class of patterns in automata such as Conway's Game of Life.
- Puffer, an enemy from the Metroid series
- Puffer, a type of circuit breaker
- Puffer, name for a particular type of German Wheellock pistol, usually from Nuremberg or Augsburg
- Supercharger for a motor car engine
- Puffer machine, used to detect explosives
- PUFfeR (Peninsula Ultra Fun Run), a Trail Running Ultra-marathon.
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