puff‧er /ˈpʌfə $ -ər/ noun [countable]

1. British English informal a small piece of equipment containing medicine which you breathe in through your mouth, to help you breathe more easily Synonym : inhaler:
Asthma can be made worse by using puffers too often.

2. a type of tropical fish that can fill itself with air so that it looks almost round

[TahlilGaran] Dictionary of Contemporary English ▲