Green’s Dictionary of Slang

roof v.4

[roofie n.2 (1)]

(drugs) to dose with Rohypnol.

[US]L. Berney Gutshot Straight [ebook] Gina sat on the edge of the bed [...] ‘Gamma hydroxybutyrate, sweetie,’ she said. Shake’s brain translated sluggishly. ‘You roofed me’.