Definition of rantum-scantum in English:
rantum-scantum
noun
Reckless or heedless behaviour, (in early use) especially wild or uninhibited sexual activity.
Origin
Late 16th century (in an earlier sense). A rhyming compound, of uncertain origin; perhaps compare earlier random and slightly later rant.
Pronunciation
rantum-scantum
/ˈrantəmˌskantəm/