Someone who uses roofies to get someone else to sleep with them. GDI's and haters of greek life like to accuse fraternities of having such people in their houses- as a way of undermining the popularity of the fraternity on campus
Person 1: That fraternity is sketch, They have been known to roofy freshmen girls.
Person 2: Seriously!? who are the roofers in the fraternity?
Person 1: Like all of them