Green’s Dictionary of Slang

Rohie n.

also Rohy
[abbr.]

(drugs) the sedative Rohypnol.

[Aus]L. Davies Candy 151: She knew I was on Rohies, so she knew I wouldn’t go far.
[Aus]C. Hammer Silver [ebook] ‘And that other shit. Rohies.’ ‘Rohypnol?’ The date rape drug.