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pep someone or something up
to make someone or something more vigorous. Nancy needs to take some vitamins to pep her up. The coffee break pepped up the tired workers. Better food might pep your cat up.
1. To cause something to become more exciting or interesting: A little spice will pep up the flavor of the stew. We could use a good comedian to pep this party up!
2. To cause someone to become more alert and energetic: I drank coffee to pep myself up as the night wore on. A little music might pep up our bored guests.