"Yeah, but "Mr. Brown", that's a little too close to "Mr. Shit"." ― Mr. Brown complaining about his code name.[source]
Mr. Brown was a minor character in the 1992 film Reservoir Dogs. He is one of the six men (alongside Mr. Blonde, Mr. White, Mr. Pink, Mr. Orange, and Mr. Blue) hired by mob boss Joe Cabot for a diamond heist.
He was portrayed by Quentin Tarantino, who also written and directed the film.
Before the heist
Mr. Brown is first seen at the beginning of the film sitting with his five accomplices, Joe, and Cabot's son Eddie at a diner, where the men have various casual conversations before executing the heist, including Mr. Brown stating that Madonna's song "Like a Virgin" is a metaphor for "big dicks".
After the heist
During the jewelry robbery, Mr. Blonde murders several civilians after one of the civilians triggered the alarm. He escapes along with Mr. White and Mr. Orange but he is shot in the head by a cop.
Mr Brown is shot in the head by a cop but he survives the wound as he eventually gets in a getaway car with White and Orange. Unfortunately, he crashes into a car due to his wound. Mr. White exits the car as Orange defends with Brown. White systematically shoots two policemen dead as the cops arrives. Orange watches but Brown passes away and the two leave his body in the car.