pump up

verb6

1. •
   To inflate by means of a pump.
2. •
   To do so with a pumping action.

   • For someone who is in shape, it is not difficult to pump up a car tire with a bicycle pump; it is merely tedious. But you can get the job done if you need it bad enough.
3. •
   (figurative) To excite a person or group to a frenzy.

   • The singer has been pumping up the audience.
4. •
   To cause (something) to increase in intensity, salience or other traits beyond what is reasonable.

   • You have to pump up the relatability of the characters in your screenplay.
5. •
   To increase the volume of (something).
6. •
   To cause one's muscles to swell by means of focused weightlifting.

   • I want to pump you up.
   • He's gonna help me pump up.