pump up

Short definition from Wiktionary

Verb

1. 1
   To inflate by means of a pump.
2. 2
   To inflate with a pumping action.
3. 3
   To excite a person or group to a frenzy.
4. 4
   To cause one's muscles to swell by means of focused weightlifting.
5. 5
   To cause (something) to increase in intensity, salience or other traits beyond what is reasonable.
6. 6
   To increase the volume of (something)