It's Beast Coast, we the murderous set
Beast Coast is a moniker for Pro Era and other rappers who represent a similar style, swank and standard of excellence.
It also includes fellow BK rappers: Flatbush Zombies & Underachievers.
He ties to the previous line- “vets” is a double entendre for veterinarians (for BEAST coast) and veterans (as in veterans to the Game).
To help improve the meaning of these lyrics, visit "Like Water" by Pro Era (Ft. Capital STEEZ, CJ Fly & Joey BADA$$) Lyrics 3 and leave a comment on the lyrics box