Definition of rubaboo in US English:

rubaboo

(also rubeiboo, rubbaboo, rababoo)

noun

North American
historical
  • A kind of soup or broth made from pemmican.

Origin

Early 19th century. Apparently from Canadian French rababou from Ojibwa regional (Saulteaux) waabaabo, lit. ‘white broth’, with change of initial consonant probably partly by association with French ratatouille.

Pronunciation

rubaboo

/rʌbəˈbuː/