Source : WordNet®

pep up
     v 1: urge on or encourage especially by shouts; "The crowd
          cheered the demonstrating strikers" [syn: {cheer}, {inspire},
           {urge}, {barrack}, {urge on}, {exhort}]
     2: e.g.,make more interesting or lively; "juice up a party";
        "pep up your paper" [syn: {jazz up}, {juice up}, {ginger
        up}]