TO PERK UP. 16-04-2011. Proficiency.

to perk up a perk up              

    1    perk up   perks up; perking up; perked up

     If something perks you up or if you perk up, you become cheerful and lively, after feeling tired, bored, or depressed.

         He perks up and jokes with them.

         ...suggestions to make you smile and perk you up.

     PHR-V-ERG 

    

    2   perk up   perks up; perking up; perked up

     If you perk something up, you make it more interesting.

         To make the bland taste more interesting, the locals began perking it up with local produce.

         Psychological twists perk up an otherwise predictable story line.

     PHR-V 

    

    3   perk up   perks up; perking up; perked up

     If sales, prices, or economies perk up, or if something perks them up, they begin to increase or improve. (JOURNALISM)

         House prices could perk up during the autumn.

         Anything that could save the company money and perk up its cash flow was examined.

     PHR-V-ERG 

COLLINS DICTIONARY.