Definition of pepping up in US English:

pepping up

noun

  • The action of making a person or thing more lively or energetic; restoration of energy or enthusiasm; an instance of this.

Origin

Early 20th century; earliest use found in The Decatur Review. From pep + -ing + up, after to pep up.

Pronunciation

pepping up

/ˌpɛpɪŋ ˈʌp/