Blood In Blood Out (also known as Bound by Honor and Blood In Blood Out: Bound By Honor) is a 1993 American epic crime drama film directed by Taylor Hackford, from a screenplay co-written by Jimmy Santiago Baca and Floyd Mutrux. The film follows the intertwining lives of three Chicano relatives from 1972 to 1984. They start out as of a street gang in East Los Angeles, and as dramatic incidents occur, their lives and friendships are forever changed.

The film stars Jesse Borrego, Benjamin Bratt, Enrique Castillo, and Damian Chapa in the principal roles. The screenplay is partly autobiographical, drawn from Baca’s experiences in street gangs and imprisonment. The film's title refers to the initiation ritual of having to kill someone to enter a gang and, on the reverse end, not being able to leave the gang unless killed.

The film was released by Buena Vista Pictures Distribution on February 2, 1993. Critical reviews were mixed to positive, and Blood In Blood Out was a box office disappointment, but later became a cult classic film among parts of the Mexican-American community.