A cock deflector is a female that is 1)a definite eye sore but also 2)someone that is repulsive in every sense of the word. They cannot maintain conversation or flirt in a manner that is normal. Rather, they try and acquire anything with a cock. Lastly, 3)They are dirty and probably spread STI's. Essentially, cock deflectors make guys (owners of cocks) run in the opposite direction, whenever they approach.
by Urban Dictionary June 4, 2004