Definition of rantum-scootum in English:

rantum-scootum

adjective

US
rare
  • Harum-scarum; = rantum-scantum.

Origin

Late 19th century; earliest use found in Harper's Magazine. Perhaps a variant of rantum-scantum, or perhaps an alteration after scoot.

Pronunciation

rantum-scootum

/ˌrantəmˈskuːtəm/