The five dots tattoo is a tattoo of five dots arranged in a quincunx, usually on the outer surface of the hand, between the thumb and the index finger. The tattoo has different meanings in different cultures—it has been variously interpreted as a fertility symbol,[0] a reminder of sayings on how to treat women or police,[0] a recognition symbol among the Romani people,[0] a group of close friends,[0] standing alone in the world,[0] or time spent in prison (with the outer four dots representing the prison walls and the inner dot representing the prisoner).[0] Thomas Edison had this pattern tattooed on his forearm.[0] The five dots tattoo is also most prevalent amongst gangsters. For example, in northern California it is a tattoo that symbolizes the membership of the "00 Street Locos", a juvenile institution gang, created and founded in Monterey County, CA and later spread across the county streets. In the US, it is also believed to have spread from Vietnamese gangs, who use it to mean, "A group of friends".

The five dot tattoo resembles the five shields on the Portuguese flag--the shields representing the five Holy Wounds inflicted upon Jesus during his crucifixion--and was formerly worn by many members of the Portuguese armed forces. It has since become a popular tattoo for first generation Portuguese-Americans and Portuguese-Canadians.