Stop lying, its when you kill a rabbit cut it up then blend it and mix it with alcohol and you have a rabbit punch.
Yeah I grew up in country Australia and thats how we used to kill rabbits when they're wounded. Hold 'em hanging by the back legs and then karate chop them just behind the ears - instant death.
If you want to learn the proper technique for it watch any Sam Peter fight. It is generally what he scores his Knockdowns with, as opposed to actual legal punch.