SAMCRO stands for "Sons of Anarchy Motorcycle Club Redwood Original." It is the original and founding charter of the Sons of Anarchy motorcycle club in the TV series Sons of Anarchy

. The club was founded in 1967 by Vietnam War veterans John Teller and Piermont "Piney" Winston in the fictional town of Charming, California

. The name SAMCRO is often pronounced or referred to as "Sam Crow," which is a personification or nickname for the club itself

. SAMCRO is the "mother charter" of the organization and is central to the show's plot, involving the club's activities, internal dynamics, and conflicts with rival gangs and law enforcement