it is where you get hit in the nuts so hard that they move back and forth causing whiplash and it causes large amounts of pain
guy1:Hey! whats up?
Ninja:*kicks guy1 in the nuts*
guy1:Oh! god nut whiplash...
Ninja:....*walks away calmly*
Ninja:*kicks guy1 in the nuts*
guy1:Oh! god nut whiplash...
Ninja:....*walks away calmly*
by kyle mueller March 09, 2007