Well, when I was at work one day I told a friend we should give a girl that fits that description a special name so that we could talk about them right in front of their face and they'd never know. My friend replied, "Fuzzy pickle!" And so, the fuzzy pickle was born.
So, quite technically speaking, a fuzzy pickle is a girl that is so freaking hot that you'd still fuck her even if she was your own mother. You would also cum inside of her, causing her to get pregnant. When the child was born you'd have a son and a brother at the same time, but you'd just lie and say that the child was not yours.