Definition of pepper-upper in English:

pepper-upper

noun

US
informal
  • A person who or thing which imparts liveliness or vigour; a stimulant, a tonic.

Origin

1930s; earliest use found in The Zanesville Signal. From pep + -er + -upper, after to pep up.

Pronunciation

pepper-upper

/ˌpɛpəˈrʌpə/