Biwie is a word that defines like this:
Man who likes young girls, he's some kind of pedo and usually have very weird sexual fantasies about screwdriwers or other commonly used household items.
It's not normal pedo because of his weird fantasies, can be also used as defining someone who likes to use fire/hot items as his sexual items.
"look, that dude is definedly biwie, he follows that young girl with screwdriver in his pocket"
"haha, jerry is definedly biwie, I heard that he turns on if he sees fire"
"I went to DTM last saturday and I saw a dude dancing with little wrench in his neck with chain on it, and he looked one young girl so weirdly that it scared me"