Less Than Zero is a 1987 American drama film very loosely based on Bret Easton Ellis' novel of the same name. The film stars Andrew McCarthy as Clay, a college freshman returning home for Christmas to spend time with his ex-girlfriend Blair (Jami Gertz) and his friend Julian (Robert Downey, Jr.), who is also a drug addict. The film presents a look at the culture of wealthy, decadent youth in Los Angeles. Wikipedia
Julian: I mean, come on. Can't you tell when I'm telling the truth?
Benjamin Wells: No. Trust was the first thing you ruined.