rev up

verb

1. To increase the speed of an engine, especially that of a stationary motor car.

   “The huge Rolls-Royce engine revved up. Then the back wheels spun furiously, and clouds of smoke filled the air.”

2. To make (someone or something) more active; to energize.

   “Blast out of the gate on Monday by listening to up-tempo music before your workout. Israeli scientists say this can raise your heart rate, rev you up for an intense exercise session, and temporarily boost muscle power by 10 percent.”

3. To become more active.

   “I didn't much want to leave again, but, though I'm not sure I exactly understand why, I just knew I had to rev up again to play this thing out.”