n.
25A0; perk up
you seem to have perked up : CHEER UP, brighten up, liven up, take heart; informal buck up.
the economy has been slow to perk up : RECOVER, rally, improve, revive, take a turn for the better, look up, pick up, bounce back.
25A0; perk someone/something up you could do with something to perk you up : CHEER UP, liven up, brighten up, raise someone's spirits, give someone a boost/lift, revitalize, invigorate, energize, enliven, ginger up, put new life/heart into, put some spark into, rejuvenate, refresh, vitalize; informal buck up, pep up.