a) an electric sex toy used for masturbation that resembles a cunt
b) brand name for the above mentioned
c) an offensive slang term used to describe the biggest, meanest bitches out there. Trumps bitch, whore, cunt, etc.
a) Man, don't use a pocket pussy! Get a thundercunt.
b) The Thundercunt is one of the electric fake pussies on the market today
c) That thundercunt hung up on me!