Question is about using вы instead of ты. I already know Serbian, so I know when you use one and when the other (Vi i Ti), what I'm interested in is, how is this form of address called in Russian?
In Serbian it's called "Persiranje" or as a verb "Persirati", but despite all Serbian/Russian similarities, the only word sounding like that I found was "пересирать" which is one step away from meaning the complete opposite :P