What desperate sick fuckers use to get laid. Its a pill form of the drug rohypnal which causes the taker...or in this case victim..to lose all self control, independence and slight conscious loss so that they can be raped without resistance. Most cases involve the rapist putting the disolvable pill into an unattended beverage.
"Dude here put this in her drink and she'll be easy to handle"
"You fucking sick roofie slipping cunt i hope you die.