lively spirits or energy; vigor; animation. ?

pep up, to make or become spirited, vigorous

or lively; animate

We need something to pep up this party.

noun

apathy , inactivity , lethargy , lifelessness

noun

animation , bang , birr , energy , get-up-and-go , go , gusto , hardihood , high spirits , life , liveliness , moxie * , potency , punch * , push , snap * , spirit , starch * , tuck * , verve , vitality , vivacity , zip * , bounce , brio , dash , lan , esprit , pertness , sparkle , vigor , vim , vivaciousness , zip , force , might , power , puissance , sprightliness , steam , strength , briskness , enthusiasm , getup , ginger , invigorate , oomph , snap