Use this term to really piss someone off. Cuntwarts are particularly repulsive. They fill up with puss and then when you get that feeling when you cant resist, burst it, BUT, make sure you are standing near a mirror so the puss launches itself at it. mmmmm then scrape the remnants off the mirror and put it in a stew.
daniel Craig is a cuntwart. His face looks like a fanny which has received a rather bad case of leprosy and is enjoying bathing in its own fluidy goodness. the cunt!