Alternative form of date rapist.
A person that commits date rape, typically male perpetrator that commits a form of sexual assault or coercion upon an new acquaintance during what is usually a first date, either by force or with the assistance of a date rape drug.
It is very easy to fall prey to a date rapist if you are attractive and alone in a bar in a new city.
Origin of date-rapist
A combination of date rape + -ist.