Green’s Dictionary of Slang

(US gang) a ‘violation’, i.e. a punishment of a given number of blows for breaking a gang’s rules.

2001

(con. 1990s) in J. Miller One of the Guys 60: ‘If you’re in the gang and you some thing that you’re not supposed to them you get Vs. Vs is where your OG, the leader of the gang, can come and give you how many ever blows to the head.