When one says "v on my back" they are saying they do not trust anybody and all they have is themselves this phrase is popularized by the brand Vlone which sounds like alone
My boy just slimed me out wtf v on my back cant trust nobody
When your friend or someone you know does something that hurts or betrays another dude like going for another mans girl
Yoh this guy a slimey dude he playing imessage games with my girl