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  1. lively spirits or energy; vigor; animation.
Verb Phrases past and past participle pepped up, present participle pep·ping up.
  1. pep up, to make or become spirited, vigorous, or lively; animate: We need something to pep up this party.

Origin of pep

First recorded in 1840–50; short for pepper
Related formspep·ful, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for pep up


  1. high spirits, energy, or vitality
verb peps, pepping or pepped
  1. (tr usually foll by up) to liven by imbuing with new vigour

Word Origin

C20: short for pepper


n acronym for
  1. 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
abbreviation for
  1. political and economic planning
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for pep up



"vigor, energy," 1912, shortened form of pepper (n.), which was used in the figurative sense of "spirit, energy" from at least 1847. Pep rally is attested from 1945; pep talk from 1926. To pep (something) up is from 1925.

Online Etymology Dictionary, © 2010 Douglas Harper