pump up

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pump up (third-person singular simple present pumps up, present participle pumping up, simple past and past participle pumped up)

  1. (transitive) To inflate by means of a pump.
  2. (transitive) To inflate with a pumping action.
  3. (transitive, figuratively) To excite a person or group to a frenzy.
  4. (intransitive, bodybuilding) To cause one's muscles to swell by means of focussed weightlifting.