The six-pointed star, often seen as a tattoo among Crips gang members, is one of a number of identifying marks used to differentiate between different gangs. The exact meaning behind the star, if there is one, is unknown.
It's common for individual gangs or gang members to adopt certain symbols or phrases to identify themselves with a specific location or neighborhood. These symbols are expressed through graffiti or as tattoos on the gang members themselves. The use of symbols and colors helps law enforcement keep track of individual gangs, although this is not the intention of the gangs. Aside from the six-pointed star, Crips members also wear the color blue and sometimes use a six-pointed crown symbol.