1.A sarcastic, yet obvious, dissimination of disbelief in what people are saying. i.e. calling people out on their bullshit.
2. Conveying belief that the probability of an event or something being true is zero in response to a question or a weak statement.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)