Dictionary definition · puff up
verb
- make larger or distend"The estimates were puffed up"
- to swell or cause to enlarge"Her faced puffed up from the drugs"
- become filled with pride, arrogance, or anger"The mother was swelling with importance when she spoke of her son"
- praise extravagantly"The critics puffed up this Broadway production"
Source: Open English WordNet (CC BY 4.0).