From Rap Dictionary
62 Brim "Hit-up" disrespecting their rivals. "Napp" is a derogatory term for Neighbor Hood Crips. Below it, a declaration of war towards all Crips in general ("CK" stands for 'Crip Killer'). More specifically, the Rollin 40s Neighborhood Crips and Rollin 60s Neighborhood Crips.
The 62 Brims are a subset or faction of the larger Harvard Park Brims gang in Los Angeles, California. This gang is said to be the strongest and most active faction of the Harvard Park Brims, meaning they are in constant conflict with rivals and members are more prone to violence. The 62 Brims are among the only Bloods gang surrounded by Crips on all sides.