Chinese Throwing Gekko
I have no words to describe this... none at all.
Update: In tail-in mode, the Gekkos will chew through your opponent with maximum bitiness. In tail-out mode, the tails will lodge into your opponent, break off, and grow new gekkos on the inside.
Update #2: I added mirrored versions so you can print them and glue them together for double the bitiness or tailiness. This also accommodates southpaws.