Definition of rookus in US English:

rookus

(also roocus, roukous)

noun

Southern, South Midland, US, Regional
  • Ruckus. Now rare.

Origin

Late 19th century; earliest use found in Century. Representing a United States regional (chiefly southern and south Midland) pronunciation of ruckus. Perhaps compare rook.

Pronunciation

rookus

/ˈrʊkəs/