Fark means to waste $5 a month trying to be defined by insults, boob shots, racist epithets, scabs, pustules, goiters, dendroids, dermoids, and all other kinds of disgusting ephemera.
To Fark someone means to whisper tenderly in their ear how much you dislike them while you slowly and silently ease from your sphincter smells that would make maggots gallop.
"Do you like my boobs?"
"Your undermoobs are unremarkable."
"Show me your insulin pump."