v. & adj.
—v.tr. raise (one's head etc.) briskly.
—adj. perky; pert.
Phrases and idioms:
perk up
1 recover confidence, courage, life, or zest.
2 restore confidence or courage or liveliness in (esp. another person).
3 smarten up.
Etymology: ME, perh. f. var. of PERCH(1)
2.
n. Brit. colloq. a perquisite.
Etymology: abbr.
3.
v. colloq.
1 intr. (of coffee) percolate, make a bubbling sound in the percolator.
2 tr. percolate (coffee).
Etymology: abbr. of PERCOLATE
Useful english dictionary. 2012.