From all over southern california. I have seen it on several tattoo artists and was told it originated with hispanic gangs a long time ago. It supposedly stands for,"con suertos", "con sabos", or "con safos" everyone I talk to has a different story.
I have been told several different meanings. Like "with respect", "protected by god", and "with safety"
The only consistancy is that the general idea behind it is give respect get respect.