A hiva is a male diva. It is pronounced "Hee-Vah".
A friend of mine went to a Ryan Adams concert and someone requested "Summer of '69". This pissed Ryan off because he's Ryan Adams, not Bryan Adams. Still, instead of ignoring the request, he stopped the show, turned on the house lights at the venue and told the person who made the request to get the f--- out.
Ryan was being a hiva.