puff up

verb5

1. •
   To inflate with air.

   • We puffed up the balloons.
2. •
   To fluff up, such as an animal raising its fur or feathers to appear larger or conserve body heat.

   • Small birds puff up while sleeping to keep warm.
   • The angry cat hissed and puffed up its fur.
3. •
   To swell due to injury or illness.

   • My hand puffed up where the cat had scratched me.
4. •
   (figurative) To become proud. (Often written as puffed up with pride.)
5. •
   To trump up.