Also found in: Medical, Wikipedia.
Rohypnol, a brand name for a very potent tranquilizer producing a sedative effect, amnesia, and muscle relaxation; sometimes used as a date-rape drug
Abused, Confused, & Misused Words by Mary Embree Copyright © 2007, 2013 by Mary Embree
A tablet of the sedative flunitrazepam.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Medicine) drugs slang a dose of the sedative drug flunitrazepam
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
[1990–95, Amer.; allegedly fr. its use by roofers]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.