What is Nikki nine doors?

Answer 1

Nikki Nikki nine doors is a harmless prank played by youngsters for almost 100 years in many countries. Aka, knock down ginger, and many others. The prankster runs up a house, rings or knocks on the door, then runs away usually laughing and seeking a good hiding spot to watch the homeowner looking around for them. We never picked on homes known to be occupied by seniors or disabled. Sure beats tagging buildings with paint.