1: To be a pigeon and fly around in circles irritating people.
2: To stand on the outer sides of a circle stealing the conservation without adding any input.
3: To attack people unprovoked using your claws to scratch at their face.
4: To have an uncanny resemblance to a pigeon.

Verb. To pull a "Nck White" is to start a conversation with a question or saying hello and when the other person responds with a hello or a question back you do not reply.