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English word roofie comes from English flunitrazepam
flunitrazepam (English)
A sedative drug used as a date rape drug, marketed as Rohypnol for proper use.
roofie (English)
(by extension) Any drug designed to make someone drowsy or disoriented.. (slang, often, plurale tantum) The date rape drug flunitrazepam. (slang, transitive) To cause someone to (usually unknowingly) ingest roofies.. (slang, transitive) To put roofies in, to spike with roofies.