Green’s Dictionary of Slang

coochie-coo adj.

(Aus.) intimate.

1996		J. Byrell Lairs, Urgers & Coat-Tuggers 226: Gai Smith had made an appearance or two on the coochy-coo, camp, sutures-and-scalpels Reg Grundy soap ‘The Young Doctors’.
1996		J. Byrell Lairs, Urgers & Coat-Tuggers 232: This was the first time Brucie The Rooster had been inside the coochie-coo confines of the Members’ at Royal Randy.