VBS is an acronym for verbal bitch
slap. It is most commonly used as a verb.
To tell off an individual using a professional tone, correct
grammar and big words. Also inflicting some kind of emotional
pain that is surprising to the individual getting VBSed. Basically laying it down in a way that cannot provoke a hostile response, yet puts the individual into their place in an eloquent fashion. You've been lawyered and there is no words that can fight back.