pep up, to make or become spirited, vigorous, or lively; animate: We need something to pep up this party.
high spirits, energy, or vitality
(transitive) usually foll by up. to liven by imbuing with new vigour
personal equity plan: a method of saving in the U.K. with certain tax advantages, in which investments up to a fixed annual value can be purchased: replaced by the ISA in 1999 but arrangements for existing PEPs remain unchanged