viper cunt
Used only in extreme situations generally female to female to describe a woman who will do anything to get her way.
I can't believe Marsha stole Jan's boyfriend, she's such a viper cunt.
Viper Cunt
An aggressive and seemingly vindictive bitch who delights in ruining lives for those around her for no reason.
"Belinda is being a total viper cunt to her sister."
"Someone is viper cunting all over this party, and we all know who."
"Someone is viper cunting all over this party, and we all know who."