A combination of the term "dick" and "cunt" to make a unisex slur to any person who happens to be of an annoyance or just a plain bitch. However, "cunk" can be used a term of endearment to close friends, family, or acquaintances.
"Becky is such a cunk, she didn't even call me back!"
OR, (as a term of endearment)
"You know I love you, you silly cunk!"