puff up

verb

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. To become proud. (Often written as puffed up with pride.)

   “Sore against our will did we of Witchland join with the Demons in that war, foreseeing (as hath been bloodily approved) that the issue must be but the puffing up of the Demons, who desire no other thing than to be lords and tyrants of all the world.”