[perk] vb [ME] vi (14c) 1 a: to thrust up the head, stretch out the neck, or carry the body in a bold or insolent manner b: to stick up or out jauntily
2: to gain in vigor or cheerfulness esp. after a period of weakness or depression--usu. used with up "he's ~ed up noticeably" ~ vt 1: to make smart or spruce in appearance: freshen, improve
2: to thrust up quickly or impudently
[2]perk vi (1656): percolate [3]perk n (1824): perquisite--usu. used in pl.