1.
If something perks you up or if you ~, 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.
PHRASAL VERB: V P, V n P
2.
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 ~ an otherwise predictable story line.
PHRASAL VERB: V n P, V P n
3.
If sales, prices, or economies ~, or if something perks them up, they begin to increase or improve. (JOURNALISM)
House prices could ~ during the autumn...
Anything that could save the company money and ~ its cash flow was examined.
PHRASAL VERB: V P, V P n (not pron), also V n P