A Clang Fang is a icicle that forms in sub-zero temperatures exclusively forming on either female genitalia or the taint.
Females use their Clang Fangs as protection from virginity goblin (s) and other such creatures of the dark lord.
Girl 1: hey... My clang fang fell of and now I'm vulnerable to predators
Girl 2: I'm sorry this is natural selection
*Leaves*
Girl 1: *descended upon by the forces of the dark lord*